If your internet connection is good, and your computer at least decent, then it shouldn't be freezing on you.
I have league pass broadband and connect my computer to my 42" plasma. The quality is a step below normal television, but it's very watchable and enjoyable.
Don't get the $134 plan. Get the "choose 7 teams plan" which is only $90.
My only complaint with league pass so far is that the Celtics are rarely on it! I understand that all cbs, abc, tnt, etc games are blacked out, but NBA TV games are blacked out too. That in particular doesn't make sense to me as NBA tv, as well as league pass, are owned by the NBA.