I unboxed mine today and was very impressed by the build quality, much more cast metal than expected. I managed to grind a 1 inch chisel to 120grit, but haven't had time to finish.
A note of caution:
If you don't have a permanent workshop (like me), I would strongly recommend you use the WS3000 outside. I was using it and a got a lot of metal dust after just about a minute and a half of grinding. The danger of this is two fold: first of all, these particulates are not good for your lungs, but also, they present a fire hazard. I saw steel filings fly off the back, but after about a minute I got a real fright when I saw a big cluster of this dust smoulder red hot. Fortunately it didn't burst into flames, but the embers were enough to scare me!
However, I have a feeling that I was leaving the chisel in the port a little bit to long, which could have been the reason for the unexpected heat build up.
So all in all, be careful (and be less stupid than me!)
PS: Absolutely no problems with the machine itself, it has exceeded all my expectations (so far)