My husband broke his collar bone by hitting a wall and falling off. However, before that we were having a grand time. Liked Sarah Lynn our guide and our group was very friendly. They are easy to learn how to ride and you can see more of the city on them. All you need to worry about is your base is wide and don't hit a wall. I still think this is great fun and would do it again.
The tour was great although my husband fell and cut his ankle really bad on the segway. There was one funky corner that had 2 curbs and a young girl pulled in front of him which caused him to flip. Not the fault of the tour guide just be careful of the people around you.
The best tour I ever had!!! Highly recommend it! TONS of fun!