Glass parts to hold the coffee.  
Solid construction.
Design/looks.
Quieter than my previous machine.

Glass to break.
Ledge in the hopper.
(2nd week update) - it jammed up!

I've been wanting a good grinder for quite a while now.  I'd been using a Mr. Coffee burr grinder (wincing as I admit it) and was beginning to think it might just give up any time.  The grinds stuck to the container; the last beans to be ground would jump around in the hopper and never get ground; and it is really noisy.  So I went ahead and bought this one - retail!!!  

I use both espresso and drip coffee, so I needed a doserless machine.  I like to grind a couple day's ahead, and the container for the ground coffee is a good size for that.  

I've read the reviews - after I already got my machine - and agree that the ledge at the bottom of the hopper hangs up some beans.  I just stir them in when it gets to that point in the process.  It's still new to me, so we'll have to see if that becomes a problem.  On my old machine, I had to occasionally stir the beans just to keep it going.  

I may go ahead and order some replacements for the glass pieces.  If one breaks, I won't want to wait for the replacements to get here before I can use it again.

(2nd week update):  I had run some medium grind thru it for my drip coffee, and then wanted do a finer grind for espresso and the thing jammed up.  I called KA and they said it had to be cleaned of the beans in the burrs.  I tried to follow the instructions to take it apart, and it just didn't work until I took some pliers to it.  I got it apart and cleaned, and examined it closely.  The berring around the shaft was gulled (had a burr) and was wearing on the shaft that drives the grinding burrs.  I don't know if that's why it had trouble or not, but I'm going to send it back to Wms-Sonoma.

Wms-Sonoma was great.  I ordered over the net and it arrived a day before predicted!