Yes, we did "BOB" last year and loved it. We were on Radiance of the Seas and I did write a review with pics at the end. Its a totally different excursion, well worth the money. YOu have time while waiting for your bob to hang around on the boat, and or go snorkeling, they will provide the gear. YOu get about half an hour on the actual Bob and for every 2 people on bobs, they have divers, so they are down there to assist you, take your pic and lead the way.
Here is the link to my review if you want to look at the pics: