I'm also looking into SSI Center for my husband to do his Advanced in March. I contacted several operators, but Albartos Charters actually read and email me w the correct response to my email questions. Del Mar Aquatic didn't read my email request, they just quoted my 2 tanks dives and rental prices and also thought I was coming in tomorrow. Some others only do checkout dives per their email. My next dilemma is that I made my reservation w Scuba Mau for my dives. Since, he is working on his Advanced, I should just dive w Scuba Mau and Albaltros Charter will take good care of him. Because, when I did my Advanced in Bali it was me and the instructor. The other divers had to go w another dive guide since I was taking my course work.