The show peeked in season 3.

Update from my first comment: I really enjoy this show, especially after the 1st season (which had some startup problems with the acting and stories.) It is not the best or most witty out there, but it (usually) isn't very bad either. However, now the 4th season has reached its end I think the show is running at its creative end. I'll give it one more season where they need to reinvent themselves or make a nice exit story. If this doesn't happen it could become boring quick and is at risk of turning into one of thos uninspired run of the mill sitcom. That would be a sad end for this show imho.

Best thing is the acting. The jokes are not that funny, but luckily it is not of crude level like used in shows like "2 Broke Girls."

They are just soo H-I-L-A-R-I-O-U-S. I want more and more...