The first few episodes are probably the weakest conceptually in that they're really episodic and contain some generic elements. Middle of the first season shakes things up and then the second takes it to a higher level.
Can get into more detail if you're interested, but basically: check it out, if the first episode or so doesn't do much for you don't write it off, since even a lot of fans aren't big on the very beginning. Try skipping ahead a bit to see what you think of later episodes-- though if you like it from the beginning there's no problem.
It's good, gets into plot and leep dore while retaining a sense of humor and fun. It sort of comes off as dumber than it actually is at times, as in there's more thought put into its development and universe then just watching one episode could lead you to believe, and the directions they take things can be surprising.
Honestly though if you already don't see the art style as "CalArts" or "tumblr" or a blight upon the industry or whatever, then you're halfway to liking it already. It's storyboard-driven, some fun expressions and such.