Only visited Porto-Vecchio one day on a Windsurf Cruise.
Karin the owner, picked me up at the harbor and brought me on a 10-15 min ride to their shop. There, I was introduced to her staff and Nadine, the DiveMaster guiding me on the dives. I was given a briefing of the boat and dive site along with the dive plan.
The boat was a RIB and was well equipped with DAN rescue equipment. The first dive was just Nadine and myself. Up till then I had questioned dragging my own dive gear half way across the globe to dive but when my head hit the water, I was ecstatic I had gone to the trouble. The site was near a small rocky island and was a marine reserve. It was nothing short of astonishing with regards to marine life. Neither on St Croix or the Keys have I experienced so much marine life. Water temps were 58-63F and a 7 ml wetsuit was just fine. I did two dives at this site and had it been 20 degrees warmer, it would have eclipsed anything I've experienced in the Caribbean.
The shop was small but had dunk tanks and showers with clean bathrooms nearby. At the end of the day, they brought me back to my ship on time. Karin and her staff were friendly, professional and did everything by the book. I will try to make it back here next summer as it was just a wonderful experience. Make sure to bring Euros as they don't take credit cards and pack a lunch. The only other thing to say is that the club and beach are part of a larger campsite in a nature reserve. The campsite caters to nude clientele. Though they weren't there the day I went, I was told during the summer there can be up to 2 thousand nude people there. So if that offends you, maybe you should shop around. Myself, the service and the site overrules the nudist.