This is a scubadiving resort called Uncle Chan, located on Mabul Island, near the famous dive spot of Sipadan Island (Borneo)
I went for one day of scubadiving with Uncle Chan. The price was not too expensive, the equipment was good, and the divemasters and crew were very nice. I could not dive at Sipadan Island (the best spot), because you need to reserve in advance or pay a lot more due to limited number of permits issued (and scalping / gouging by dive operators).
The diving at Mabul Island, just North of Sipadan, was good, with a lot of marine life in artificial reefs. I'd say it's not worth going there just for the diving, but if you are in the region, it's not a bad experience.