I like it, in my opinion, the best comedy show I've watched, but I haven't watched a lot of them so far, I think is very good, contrary to popular opinion, I don't think it falls off that much on its last seasons, but when it's in its peak (season 3-6) it's such a good show to watch.
if you're wondering when the show picks up, most of the humor is derived from knowing the characters and their personalities. this is a common thing with the show, where people who first start watching it don't find it funny. this happened to me as well. but my friend told me to stick with it. it's now one of my all time favorite shows and i think it's hilarious. once you know the characters, it's pretty funny