In general, I enjoyed this episode. In terms of a season finale though, it isn't so hot.
In my mind, a season finale has 2 main purposes:
1. Close out the main story lines from the current season
2. Setup the next season
There are many ways to accomplish this, but this episode did neither, really.
The governor is still alive and dangerous, but has been neutered to an extent since he now only has 2 people.
I was fully expecting that Rick and co. would return just as the Governor had killed someone and then finished him off.
Maybe that was the obvious path and they didn't want to go obvious. Fair enough, but sometimes the obvious path is the right one.
If they wanted to leave the governor alive and still give him clout, they could have had him kidnap someone like Carl. Now that would have been a cliffhanger that had people chomping at the bit for the show to return in October. But nah...
Don't get me wrong: I enjoy the show. It's not my favorite show by any means, but that is fine. I greatly enjoyed the first 62 minutes or so. But once it got to 63 and I realized it was going to just end, it annoyed the hell out of me.
I'll be there to watch when it comes back in October, but it wasn't because the finale was so awesome that I can't wait... which is a shame.