I do not know of a bad shop on Bonaire. If I had to choose then it would be either Buddy Dive or Wannadivebonaire. I have had the pleasure of diving with both of them and have friends at both shops. Both have great staffs and good operations, you will not go wrong with either of them. If you are staying at GRI then the answer is easy, they are partnered with Wannadive so go with them. Because there are no bad shops on Bonaire it's usually just easier to go with the shop that is associated with your resort, it just makes things easier, esp for your first trip.