by Peppersass on Fri Mar 12, 2010 2:38 am
I have a GS/3 and have run into most of the problems mentioned in this thread. In fact, this is my second GS/3. The first one had a serious gicleur clog early on, and a month of work with CC failed to isolate and resolve the problem, leading to replacement of the machine. That was back before the declining flow problem was well understood and a relatively simple remedy developed. Had CC and I known what we know today, I would have replaced the gicleur instead of returning the machine (at the time, I wasn't comfortable with disassembling the group head because I was unsure that it could be put back together properly without special tools or procedures.) I'm just as glad that the machine was replaced because the exact cause of the clogging is still not known. It could be manufacturing "swarf" or it could be oxidized chrome or copper formed while the machine sat in Frank's warehouse for 18 months. The problem seems to affect some machines and not others. My first GS/3 failed within two weeks of purchase. The replacement has worked flawlessly for four months.
Well, almost flawlessly. When I first got the replacement machine, it would randomly reboot. This was harmless for the most part, but annoying. It never happened during a shot, but I was concerned that it might. I ended up disassembling the control box, taking out the PC board, cleaning it, cleaning and reseating the connectors, etc. After that the problem went away. I'm pretty sure a loose keyboard cable was the cause.
I've run into the vibration and drip tray problems mentioned in the thread. The vibration can be somewhat tamed by repositioning the pump and using cable-ties on the braided pump output hose. Several owners have reported that the longer replacement hose recently made available by LM eliminates most of the noise and vibration. I hope to try that soon. I'm also contemplating remoting the pump and motor when the warranty runs out. As for the drip tray, I fabricated a replacement out of a cooling rack for baking. It works well, but it's not beautiful.
Recently I ran into a problem with the steam boiler vent valve that's been reported by others. One morning I heard steam bubbling and gurgling inside the machine. I was virtually certain something was wrong with the vent valve. Took the right side panel and confirmed it. Removed the rear panel to expose the valve (a rubber chimney prevents access otherwise) and pushed the button on the top of the valve with a screwdriver angled to avoid my hand getting burned. A few cycles of doing that resolved the problem. I think a bit of debris had lodged in the valve, causing it to not close fully. The rubber chimney is supposed to prevent that, but I guess it's not a perfect solution. Not a big deal and it was resolved quickly and easily.
There are a few other minor issues with the GS/3. The steam arm and water arm can get little stiff, but I haven't found that to be enough of a problem to do anything about it. Some have used food-grade lubricant to loosen them up. There's some variance in the manufacturing tolerances from machine to machine. The cup tray on the one I have now has a really tight fit, whereas the first machine's cup tray didn't. There's also evidence of fabrication issues: the top panel on my machine has one screw with a washer, while the other didn't. On removing the screw and washer, I discovered the washer was put there to hide the fact that the hole had been re-drilled. Evidently, someone had drilled the first hole about 1/16" off from where it was supposed to be. You don't expect to see things like that on a machine in this price range. I suppose I could have demanded a new top panel, but I thought that would be silly. I imagibe it will knock about fifty cents off the resale value...
Ergonomically, the placement of the steam arm and buttons is very poor and potentially dangerous. It's not hard to accidentally hit the hot water button when you mean to hit one of the other buttons, and if the hot water wand is over the drip tray at the time the hot water will burn your hand. It took a few accidents for me to learn to be very careful when pushing buttons.
I wasn't able to steam very well until I replaced the stock 4-hole tip with the EPNW 4-hole tip. Then again, I was learning during that time.
I have a few very minor beefs with the firmware. I think you have to hold the continuous flow button too long to get into programming mode. When accessing functions like boiler temp offset or the automatic backflush sequence, you have to be careful to press the two buttons simultaneously, or you'll activate brewing. Some of the navigation through menus is unintuitive and requires use of multiple buttons. Often you have to skip through a lot of stuff to get where you want to go or to exit. The volumetric programming is lost if the power is removed. But all of that is minor stuff.
Now here's the bottom line: love the machine. I don't think it's the primary factor in the improvement of my coffee of the last five months. I'd say the improvement of my barista skills would be number one on that list. Second would be ditching the Macap M4 for a Baratza Vario (can't wait to taste what an even better grinder can do, but I'm still waiting for a Titan-level grinder with the perfect form factor for me to be produced.) Third would be the Vario getting broken in. What the GS/3 has done for me is pretty-much eliminate any hassle or variation with the machine. It's a rock-solid, accurate performer. The temperature is ultra-stable, doesn't require flushing (though I do a short flush for sanitary reasons) and the temp recovers quickly. The machine does the same thing, over and over, easily, consistently and without fail. This has eliminated all the machine-related variables, allowing me to focus on the coffee selection, grind, dose and prep. I happen to use the volumetric buttons, but I know some think that's heresy. They work quite well in my opinion. I suspect the consistent output of the Vario helps a lot. As for steaming, there's a ton of steam power and once I learned how to use it the results have been excellent, with little variation other than that caused by variations in the milk.
The GS/3 is relatively easy to maintain. On a daily basis, I clean the screen (I use a Synesso screen, which is much better made than the stock LM screen) and do a water backflush. I do a detergent backflush once a week. I drain the two boilers monthly. I'll probably replace the screen, screw and gasket every six months to one year. That's it.
I was inspired to upgrade to a first-rate double boiler machine by the fire-sale price on the GS/3. It was one of those irrational, impulse buy moments, but I don't regret it at all. I didn't consider the Speedster because it was so much more expensive. Although somewhat better designed, and considerably better built, the Speedster lacks some of the nice firmware features of the GS/3. The form factor wouldn't have worked in the space I have.
The Vivaldi II was the only other machine that I seriously considered. Actually, if I had it to do over I might have gotten the Vivaldi II. That's not because of the problems I've had with the GS/3, but because when I made the purchase I wasn't planning on plumbing in, at least for a long while, and I really liked the fact that the GS/3 has the flexibility to go either pour-over or plumb-in. I ended up plumbing in sooner than I expected, and had I known that I probably would have given much more consideration to the Vivaldi II. However, I still like the fact that the GS/3 could be used at another location, like a vacation home, without plumbing in.
The only other thing that put me off the Vivaldi II was the 53mm PF. Although it's not a huge thing, I preferred the standard 58mm size, on theory that there could be some desirable accessories not available in the 53mm format. Probably not an important consideration, but it was a factor in my decision.
I was also influenced by the glowing reviews of the GS/3 by very experienced baristas. My sense was that they definitely preferred the GS/3 to the Vivaldi II, probably because the GS/3 is more like the commercial machines they use. I read a few posts about the Vivaldi II here, on CG and the La Spaz board, and came away feeling that the machine might not be quite up to the GS/3's standard.
That said, strictly from a coffee taste perspective, I'm not at all sure the GS/3 provides any real advantage over the Vivaldi. The temperature stability in both is excellent, maybe a tad better the the GS/3. The GS/3 lets you adjust temperature in .2-degree increments instead of 1-degree increments. The Vivaldi lets you adjust preinfusion pressure via line pressure, the GS/3 doesn't. I suspect only the most discerning coffee drinkers would be able to tell the difference in a cup prepared properly on each machine, and I'm not even sure of that.
Dick Green