I went to oceans unlimited and Go Pro Costa Rica to do my divemaster training. The staff was great and I really learned a lot. They have everything you need to train and instructors for almost anything you want to learn. The instructors are fantastic. JT, Brad and Georgia are true professionals and great people. It was a pleasure to train with them. Bob, the owner is also the most capable captain i have ever dived with. He was always right there upon surfacing. Diving was not great when i started diving in November but the water cleared up in December. Manuel Antonio is a very interesting dive site. It lacks coral reefs but has a surprising biodiversity nonetheless. A great dive and a fantastic shop