This was our first time using CityView, and we were very pleased. We used another company in the past, and this visit was far more user friendly.
The buses came by regularly. My group of 20 did have to take two buses at times, but it was still quick and easy.
Some drivers were more entertaining than others, and some seemed to know more real history than just the memorized script. But, that's true no matter what.
I think they stop the shuttles 1 hour too soon, I would like them to end a bit later.
The other improvement they need to make, is the quality of their maps. Finding the stopping points based on their maps is....difficult at best.