Nah, but obviously heard about it 'cause it pops up often when discussions of D3 take place. I don't know if it is because I'm burned out on aRPG's or if it is just because there hasn't been anything great since Titan Quest, but I can't play any of them without falling asleep at the computer after playing for a half hour or so. Torchlight 2 wasn't a bad game, but it didn't manage to capture my interest on the D2/TQ level.
One [of the several] things I enjoyed about D2 was the way the classes played/felt completely different. A skeleton summoner necro played completely different than a blizzard sorc or a WW barb. Most of the replayability in aRPG's comes from experiencing the game with different classes. In Diablo 3 there was way too much overlap. Throw down area effect snare (blizzard, grasp of dead, caltraps) and spam generic AoE skill (which is tied to weapon damage, so weapon choice is largely pointless).
There are obviously more issues with D3 than just that, but combined with the boring itemization (+resist all and vit required on most items) there is zero reason to play any additional classes except for cosmetic reasons, since the gear/skills are essentially going to be the same.
It is also the reason I'm not waiting for them to "fix" the game, as most of my issues with it cannot be fixed unless they scrapped the whole thing and started over.