I liked it. However, there are a couple characters that were annoying. Like the character that Michael Rapaport plays. First, I can't stand Michael Rapaport. I just find him annoying as hell in anything he does. So his character annoyed the shit out of me. And the guy that plays the male "lead" (black guy, can't think of his name), his character annoys me, too. I understand that's probably how he's meant to be played. But damn...just the way he talks gets on my nerves.
And of course Walton Goggins is awesome in his role (as is usually the case with him).
But to be honest, I've never actually played the games (well, I did play about 30 minutes of one, once...but don't ask me which one), but I've seen them played (my best friend is a big fan of them). and I don't know if it follows the story line or not, but as a video game turned show, I think they did a pretty good job.