Been dabbling in this on and off.
Honestly, the amount of content is staggering and I just can't bring myself to commit to it yet. Well, that, and the weird glitches the servers issues are causing. Stuff like losing single player progress and such.
I'm also pretty uncertain about the the MP side of things. The worst part of having the servers being wonky is that the only people dedicated enough to try and play it at the moment are the real savant-like hardcore. It's absolutely no fun to play with these MLG guys. The sooner things get sorted and they can go off and play in their own little hyper-competitive corner, the better.
I'm actually shocked that the online stuff is in such a shambles that the rest of Xbox live was going wonky for a couple of days there. I figured this would have been the one game to not underestimate their server load, but apparently they did and things are now pretty busted.