I had MLB.TV last year and even though it was okay, it wasnt the greatest on PQ. I know when my kids were streaming Netflix and me a game in HD I had problems with the PQ. Also it was a hassle that only 1 tv in the house was able to watch all the games.
Yeah, I've kinda heard mixed reviews, with the possibility of buffering and some other issues. You can get it on multiple tv's by having several different devices like Roku hooked up to multiple tv's, but you need to have/buy multiple devices... I've been wondering how the quality and issues have been this year, compared to past seasons.