Quite amazing for an online game...
I loved it, played on hardcore and didn't face any difficulty until the final boss... I had stacked so much damage reflection (about 150% on my tank, over 70% on the others) that any move I used instantly killed me... I had to stay defensive for 7 rounds until all of the mirrors were dead... My favorite NG game so far.
I'm on Level 23 of the infinite dungeon now... :P