Great for the money, but for the money has its problems.
Positive Product Points
Cheap, great quality, doserless, beautiful. GREAT GRIND CONTROL!!!
Negative Product Points
Horribly designed spout, slow, too many ground caught up between burr exit and spout
First, I want everyone to know that I've used this with 2 machines. A Rancilio Commercial Machine, and my Gaggia Espresso.
It's better for the latter machine. With my Gaggia, there are no spouts, so the basket is closer to the outlet of grounds, so less is shot over. With the shop Rancilio, there are spouts on the PF, so a lot of ground shoot OVER the basket. That's a problem. Fortunately, I use it at home, not work, so that's not a problem!
This thing is HEAVY, I'd have to say about 15-20 pounds, and that helps. It doesn't move around when I'm grinding.
It's really slow, so you're talking about having your PF out of the machine for about 25-30 seconds which affects thermal stability and what not. Also I've found that a lot of coffee gets stuck between the burr exit and spout, enough that after 3 drinks, I could take the left over grounds and make ANOTHER!
The great thing about this, though, is the amazing grind control. You can control this thing to the millisecond.