I fully admit that this site has been completely commercialized. Two reasons I went were to pay respect to Bob and to see where he was born. They also tell you that a lot of the money goes to fund the school in nine mile. Captain Crazy is loud, but he show much respect on the tour as do all the guides. I think the worst part about it is they do try to get you to spend money on expensive drinks at the bar. My wife and I chose to instead burn a spliff at his resting place (which was allowed). She also left a necklace of sea shells at the mausoleum.
We also saw young children reaching their hands under the fence and begging for money. As you leave, you will be strongly hassled to buy ganja in many forms. To be honest, this was the most pressure I have ever endured to buy something in Jamaica. We almost had to run to our van. That being said, I probably wouldn't go back...but I have no regrets that I did go and pay respect.
By the way Goldilocks...if you go with a group you have to stay with that group and you get whatever guide is available.
You are not allowed to take pictures of the mausoleum and you have to remove your shoes. You spend a few quiet and reverent moments there. As I said, this part of the tour is treated with high respect. Hope that helps.