How far along are you? I finished watching all 6 seasons last night. Season 1 is pretty run of the mill stuff, a pretty bland sitcom with some nice moments. Seasons 2 and 3 was when they fully embraced their weirdness and meta-ness and where it worked, with some true classics along the way. The ass crack bandit episode mentioned above being one of the best. It remains ok in season 4 but a notch below, and then gets really bad in seasons 5 and 6, I was struggling to finish. Had the usual pinch when I watched the last one last night, as is customary at the end of any show, but I was glad it was over.
Alison Brie said in an interview recently that they'd be doing a film (which would be a nice way to cap off the 6 seasons and a movie shit), but I really hope it's a level above the last couple of seasons. And I wonder if they'll get Donald Glover to star in it - his and Dany Pudi's chemistry was one of the most endearing qualities of the show, for me.