I have and was quite dissapointed, probably due to the lack of current the day we went.
On the sheltered part, I didn't find the coral patches were as spectacular as the one you can see around Nusa Penida for instance, the coral is understandably very low or barely existant on some parts of the slope where the current runs. Since there was only little current, we didn't see exciting marine life.
I am a photographer, IMO it's not a site that I'd favor with the perpective of shooting images, there are much better sites for that around Bali (think Crystal bay, Toyapakeh, Mangroves, even Tepekong on a good day, etc.) .