Mantasscareme,
i've dove Moorea many times and have racked up around 40 - 45 dives on that island alone. i can't say enough good about the diving there. great dive sites, great dive shops, wonderful visibility, marine life, etc.
if you plan to travel more of French Polynesia, the company 'TopDive' has a dive shop on just about every island there. you can buy a dive pass, for multiple dives, and use it at any shop. at least that's how it was last time i was in Moorea, about a year ago. TopDive run a pretty good operation.
however, the dive shop that i use on Moorea is base at the 'Pearl Beach Resort' (
http://www.pearlresorts.com/moorea/main.asp) and it called 'Moorea Blue Diving Centre (
http://www.pearlresorts.com/moorea/diving.asp). i would reccomend these guys to anyone, and have been diving with them for more than 10 years.
the only problem that i have with Moorea, is that you can pretty much do everything there is to do on the island, other than spend your time diving, in just a couple of days. of course, i spend all of my time diving there, so it doesn't bother me.
One good tip: Air NewZealand flies from LAX to Auckland stopping in Tahitti. so i usually fly to Auckland for a vacation and stop in Moorea for a week of diving.
hope this helps.
cheers,
JE