I did the behind the scenes tour in April. I haven't done it on other ships, but if you have I don't see how it can be that much. It was a cool experience, but I won't be signing up for it on any other ships in the future.
For Bonaire I'd recommend a snorkel tour with Woodwind. The snorkeling at Klein Bonaire is simply amazing. The Woodwind crew is great. For $85/person for a 3-4 hour tour it included snorkel gear, a guided snorkel in two spots, snorkel gear, snacks, lunch and unlimited drinks (alcoholic or non alcoholic). The guides are with you in the water explaining what you are seeing and how the ecosystem works there. Very informative and better than your typical "get in the water and look at the fish." I can't recommend Woodwind enough. Even if you don't use them, a snorkel trip in Bonaire should be at the top of your list.
Onboard Beyond, World Class bar has some of the best drinks and bartenders on the ship. Sunset bar is another great spot for live music and a drink before dinner. Sunset aft views with a good cocktail and music - doesn't get much better than that on a cruise ship.