It is basically just the transportation to Key West and not a real tour. The driver makes some stupid jokes on the way and sometimes it gets even annoying. The bus stop on the other side of the town, then you have to walk a few blocks to go to the main attractions. The city is nice but I wouldn't go back.
Positive: Bus was on time at the hotel pickup point, enough information during the drive, well air conditioned bus.
Negative: No wifi on board, although the information page says it's included. It's a long drive and some wifi would serve as a nice distraction to kill some time. What's worse though is that we have asked the driver about the wifi at least 3 times, and everytime he said he would have to make a call to get it up and running and get back to us about it. He did not.