The Dive Guide Bonaire was said to have wonderful maps of all the sites and they are pretty useless. More of a cartoon joke than a map. I also bought a digital snorkeling guide that was supposed to have incredable detail. Eh, not so much. Returned for a refund.
That is why i purchased the kindle version. I purchased several over the years including the BSDME and donated them all the the hotel room. Not worth it for me. This is the 1st guide that may survive and be useful( may even buy the hsrdcopy also if it holds up during the trip) I am digging the maps (buddy reef is the most plain) with sand channels and such. Like the lake reef dive site, and know I know why it has its name.