As an experienced diver, I looked at various dive operators on the island. I finally chose to dive with the guys in Agia Efamia despite staying in Skala. They seemed to be the most experienced and had a more interesting range of sites to dive, including the ones off Ithaca (a short RHIB ride away). The diving was excellent including the briefings and safety elements. The WWII bomber site was just fantastic. If you are a qualified diver, I would recommend these to anyone as they seem friendly and interested in giving you a dive worthy of your hard earned Euros. Unlike the one in Skala who only seemed interested in the money and doing a shallow sceneic dive.