I loved it by the second episode, but around episode 8 I gave up (watched it while it came out). Then like a year later I went back and fucking hated myself for ever giving it up.
This is a show that's actually best watched out of order. The only important episodes are episode 1 and episode 12. Otherwise, if you don't like an episode just skip it. No reason not to!
I like episodic anime over most kinds because if it sucks for one episode it can go back to being awesome the next. If it focused on one main plot it could easily just suck the entire time.