Where the episode really generates some excitement is when Rick is recovering further at the house he and Carl found when a group of scavengers comes traipsing through. It's one of the more suspenseful scenes that the show hasn't had in a while.
It is nice to see some stories that feel like they are ripped from the pages of a comic every now and then. "Claimed" manages to feel that way, as we get to deal with three new characters that feel a bit larger-than-life.
It was another significant stride by the show's writers to make Michonne a more rounded character. Her attempts to make Carl laugh were great to watch, and I'm sure there's already dozens of gifs online of her eating 'crazy cheese' for his amusement.