So far hit or miss.
I liked episodes 2-4 more than 1, but 5 was my least favorite of the season.
I am somewhat vested in the series, so I am intrigued to see where they are taking it. Much like Season 1, not everything is as it appears in Season 2.
I think its still a little early to judge the story lines - given that we don't really know where they are headed. But, I generally prefer the William/MIB storyline, Bernard's is more difficult to follow - but allows for greater speculation, Dolores, she is probably still key to the overall story, but its not easy to understand what she is doing, or why. Maeve's story is least exciting, and probably has the least pay-off (though I think she is the one host who has gained free-will).