I have been very happy with my Super Jolly, but have made a few modifications to get to this point. I've removed the doser and hopper, then purchased a few household parts and cut them with my rotary tool (Dremel) to fit together. The result is a bulletproof single-dose grinder with almost
NO WASTE that will handle anything I throw at it. After working with this grinder for a period of time, I am now comfortable making consistent adjustments for different coffees, and can dial in a shot for correct flow within 2-3 attempts. Correcting for taste is another matter

.
As a case in point, I am currently pulling shots on some home roasted Yirgacheffe; 5 days after roast, 15.5g at "G 0.5" setting is what I wrote in my notes in January 2011, when I dialled in the shots. I set the grinder, weighed out the dose, and was able to pull a shot that, to my memory and according to my notes, was consistent with what I tasted in January.
Combined with my approach to espresso (i.e. single-dose, weighing before & after grind, grinding into basket), I will not be upgrading until someone drops a Compak K10 in my lap.
That said, If I had to do it all over again, I would've bought the Baratza Vario home grinder. I've had the chance to use it, and find it to be similar in performance. It has a much smaller footprint, and looks more like it belongs in a home setting. Then again, I haven't had the luxury of an extended test similar to what I described above, so I can't speak to the ability of a Vario to be as consistent. The tradeoff is that it's made for the home market and may not be as robust, but in the timeline and usage characteristics of a home environment, I don't know that this is significant. Also, the Vario hasn't been around long enough for any hard data on durability to be collected and examined.
Baratza's customer service is well regarded. This is significant, as the general method of acquiring a SJ is through a failed cafe or some other secondhand route. This means that you're responsible for any maintenance, which is fine if you consider yourself mechanically inclined, but not so advantageous if you prefer to leverage customer service relationships.
Your dog wants espresso.
LMWDP #288