I have been to some of the top TripAdvisor tours, B&B's and others. In every case what they all have in common is that the owners love what they are doing. Allison and John run a perfect tour, and enjoy doing it.
Everything is planned to the minute, the instructions are perfect, the bikes look new, and they make sure, above all, that you are safe. The scenery is fantastic and their local knowledge is extraordinary.
The bikes are fun and you learn how to use them pretty quick.
A word of warning: Allison will give you a heads up about the temperature before they pick you up, listen to her! You are not in downtown Vegas and depending on the season it can get pretty cold, especially on the bikes as you are whipping along.
Go, enjoy, and have fun!