by BAEvans on Fri Dec 12, 2008 12:07 pm
OK, I'll take a shot.
The Silvia (which I have owned and used for 6 months) is built of quality components, and at it's original price point of around $500 was a real deal. As the price rose, perhaps not so much.
The main problem is knowing and controlling at what temperature the coffee is brewing - the temperature control to the boiler has a wide "dead band" with swings of 20 degrees (F) or more between "heat on" and "heat off". In order to get a consistent temperature, it is necessary to use one of the "temperature surfing" techniques, such as waiting a specified number of seconds after the boiler heating light goes on after a flush brings cooler water into the boiler, or "reverse surfing" waiting a specific number of seconds after the boiler lite goes off after reaching its high set point.
A "PID" modification replaces the stock system with electronic temperature control, obviating the need for this process and rendering the machine much easier to use consistently, but raises the price above your limit unless you can find a good used PID'd Silvia. Searching forums here and other sites for "Silvia temperature surfing" will provide more details.
Secondly, the Silvia delivers high pressure brew water to the portafilter rather abruptly, giving the puck a bit of a shock. If the grind is not right, the distribution not careful, or the tamp not level, and if the portafilter is tapped or jarred after packing, the puck will fracture frequently, with fast sour pours and "spritzing" coffee due to channeling. Dose, distribution, and tamping technique need to be consistent and, perhaps, somewhat compulsive.
With experience, good espresso. High quality build. Professional portafilters and good steaming capability (with the limitations of a single boiler - waiting for temperature to come down after steaming before brewing another shot) without "froth aider" attachments. Good resale value for that reason. If you go with a Silvia, you will learn good barista technique and drink some good espresso.
At current prices, many recommending Gaggia as "serious" entry level now. I have no experience with those machines.
Bruce