I'd say nearly 60% of what is marketed as "POV" porn is crap. It is either not really POV, or is badly shot so that all heat factor is destroyed. There are only a limited number of ways to shoot quality POV but when this does happen the result can be stunning. I am a huge fan of POV porn because every once in a while a movie comes out from one of the guys who knows how to shoot it (e.g. Mike John, Tony T., Mike Stefano, Jake Malone, Everhard)

Please refer to This ADT Thread where I list recommended POV movies and later explain some of guidelines of what makes good/bad POV scenes.