Don't waste your time with large cattle call operations. Trust Tom and Cayman Marine Lab. He knows where the good stuff is, and he'll guide you right to it. I've done at least a dozen 2 tank dive trips on his boats and it's always top notch. He even gave us a free stop at Stingray city last trip while diving on the north side. He's incredibly knowledgeable and knows the Cayman waters and dive sites better than anyone. Plus, he's hilarious - why not laugh all the way through your surface interval?