I have watched the 1st Season of Kuroko no Basket, it was enjoyable as characters were building up on the series and Seirin team is still raising up. Overall, I have enjoyed the 1st season even though some episodes seemed boring.
Now for the 2nd season, I it was fair overall until the show reached the match between Seirin High and Tou team. To make long story short, the match took too many episodes (even though this was expected in a sports anime), but what I did not like is the power-up (Saiyan) style part of the play, when players were waking up and powering all suddenly. You might think this was a part of a strategy used while playing in the match, but in fact it was a lame act to add some Shounen style to a sports anime.
If you want to watch a real basketball anime (even though it is not a new one), I would recommend watching Slam Dunk.