It's OK... We went with Chico's Dive shop... There's a manta dive, that is like a 45 minute boat ride - the site is called "marietas"
According to my logs.. the water temp in Jan was 75F. Viz was about 20'
For the most part... the dive sites weren't that great in PV... but our DM was excellent, made the most of what it was....
In my notes in my logbook i wrote
"Decent dive site, but not very colorful. Cool formations, and some interesting fish, but not a lot. I wouldn't recommend diving in P.V. unless you're here, and want to dive."
So if you're there... check it out, but if you're going there to dive... there are better destinations.