I downloaded the PC version.
It's pretty good. Not too much different than 2k13, but there are some small changes, as usual. I have no interest at all in the LeBron-specific mode.
So far I've played as the Celtics against the Bucks, Sixers, Suns, and Magic. I had a full, healthy roster (minus Pressey and Faverani, who aren't in the game yet).
My impressions: the Celtics seemed better than the Magic, though not by much. The Bucks, Sixers, and Suns all seemed better than the Cs, to me.
Without Rondo, it wouldn't even be close. Celtics would be the worst team in the game. In real life, I imagine the same will hold true.
On the bright side, I had no trouble scoring with MarShon Brooks or Kelly Olynyk. I was getting 8-12 points in 10 minutes or so with each of those guys coming off the bench.
Gerald Wallace is pretty useful, too, and Jeff Green had some pretty clutch moments for me down the stretch in my win over the Magic.