Lonely Planet Review
As I have yet to dive the Cayman Islands, I went looking for what I would say is an independent review and found one at Lonely Planet:
"Already a go-to destination for stingray spotting and dramatic drop-offs, this British Overseas Territory also offers some superb wreck dives within a pirate’s ahoy from the shore. The Cayman Islands' vibrant reefs are also something of a success story. With the Caribbean thought to have lost a staggering 80 percent of its coral in recent years, largely due to the effects of global warming, a 2013 study found Cayman coral health had bounced back to levels not seen since 1999."