I used one this weekend and I found it amazing and very user friendly. It's solid and easy to back up (even with my iMac OS9).

My only only complaint is lack of midi sync (master clock) to use with my sequencers etc. It does put out an absolute MTC signal, but that's useless to me.

Maybe an updated OS will rectify that and that's when I'll buy it. I'll nurse my Yamaha MD 8 along until then, I suppose.