Quality varies pretty widely from episode to episode, guess it's a moot point now that it sold out. Watched all the first season on showtime when they first aired and there were 3 or 4 that I could see myself rewatching, 3 or 4 worth one time viewing, and the rest not worth the time watching them the first time.
The producers of the 4 volume blu-ray set (available separately to all other retailers) are very much aware of that fact as the episodes are not on the discs in airing order but are re-arranged in the same style as multi-movie DVD bundles, IE. 1 or 2 good ones with 1 or 2 crappy ones.
I consider it no accident that the 4 episodes I would consider purchasing are all on separate volumes making a full season purchase a non-starter for me.