I just returned from 3 weeks in Palau (full review to follow shortly); trip of a lifetime. I dived with Fish n Fins. One week land, one week Ocean Hunter and then final week land, staying at Palau Pacific Resort.
Let me say that Fish n Fins (FNF) are extraordinarily professional and more reasonably priced than many other dive operators (eg Sam's). They are safety conscious and attentive to all diver's needs and would bend over backward to ensure that all divers received the type of experience they were looking for. They can also help with reservations based upon budget too (Charito is wonderful).
As to the earlier question "...are they 7th day adventists?", the answer is easy HELL NO. Navot and Tovah Bornovski are Israeli's who've been in Palau for some 18 years and know the region, the people, the ocean and the diving superbly. Their priorities are contributing to Palau, customer care and it shows.
If you dive with them, you're assured of a wonderful time.
Have a great trip!