I loved this episode a lot, and I think it is one of the better ones from this season so far. Although the episode didn't focus much on the Griffins, I loved the idea of a simply Quagmire episode, and I enjoyed that a lot.
The episode was also quite funny, in my opinion, and that added to the overall awesomeness of the episode, but I didn't think that the episode was as funny as some from earlier seasons.
I would actually recommend this episode quite highly, as it is certainly an improvement over previous episodes this season. It's quite funny, and I think you'll find it to be decent.