This was our 2nd time going on a Segway tour. After our 1st time, we decided we will be doing them in every city we visit moving forward. This was even better than our 1st time! They had headphones so we could hear about the town and history without having to stop and gather around to hear the tour guide. Gary carried a gopro so we got pictures and videos too!
Only tip I could give is to wear closed toe shoes, so that you feel more stable on the unit.
If you are worried that you CAN'T do it, because you are not athletic, fear not, you don't need to be and Gary will have you practice in the parking lot until you feel comfortable knowing, you aren't going to crash!