RCI lists several timeshares in Bonaire, but the last time I checked, only two were open and accepting exchanges. One is Lions Dive Bonaire aka Buddy Dive, where I own. IMHO, this is a great resort for divers, but if you don't dive or snorkel, (or if you require a luxury unit) I don't know how well you'd like it. I've posted several reviews on TUG. What makes Lions Dive Bonaire hard to get into is its erratic VEP. Sometimes it can be pulled with a high quality resort, sometimes it requires a medium quality resort with otherwise high trading power.
The other timeshare resort on Bonaire is the Divi Flamingo Beach. They only have studios. I've never attempted to exchange into that one, so I can't tell you how tough it is.