Its an amazing series, despite what some may tell you.
The anime's ending was in season 3, despite it going on for another season for shits and giggles. Got Gurren Laggan epic for a bit there(the Gurren Laggan also makes an appearance at this time). Yeah, 52 episodes, pretty good too.
Lots of references to anime culture early on, gets a bit thicker toward the middle then lets up a bit more towards the end.
Can't wait for series 2.