Needed grind adjustment. Clogs badly if you use oily "espresso roast."
At $180, you can do much better than a La Pavoni PGB/PGC grinder. At $85--what I paid for a refurbished demo unit--it's a pretty good deal.
I got our PGC at Brewmasters Sales and Service (http://www.bssci.com/), and Darrell said he regularly receives demo grinders from La Pavoni.
As shipped, the grinder could not be dialed down to produce a fine enough grind for good espresso. Dave Bayer provides instructions on his web page for how to adjust this. It's actually pretty easy to do.
While I had the unit opened up to adjust it, I could see a lot of plastic in it. I'm not sure how that bodes for the lifetime of the grinder. The burrs, though, are large and appear to be of good quality.
This grinder does not include a "doser" but is set up to allow easy grinding directly into a portafilter basket.
This is not a professional or semi-pro grade grinder. I would not pay $180 for it. For $80, though, you're not going to do much better.