I just saw it last night, and I agree. I thought it was great for a series finale. It was a lot funnier than some of the episodes this season. My wife said that she was going to miss this show about 5 times during the finale. It is going to be weird seeing the crew move onto other shows/movies.
I liked the show for the first half of its run, and then only watched the second half out of a dearth of other options during the week, so the finale wasn't a big whoop for me. It was fine. I'm not going to miss having new episodes, though.