Having dove with Brion and Junior at Protech, and also with Roberto before he was with Ambergris Divers, I was surprised to hear that you were unsatisfied. All three individuals were exceptional dive masters. I haven't dove with Amigos so I have no comment. There are many good
dive shops on the island. Bottom Time is a great dive shop, and Rudy Duran is a great dive master. BT also does beach barbeques and snorkle trips. Look under "goods and services" for contact information. Have fun!