Highlights tour was the highlight of our short trip to NYC. Great way of seeing the city and Kevin was a great guide telling us lots of stuff you wouldn't ordinarily learn. Would recommend this trip and Kevin to all.
Bikes are good quality (Cannondale) and the cycling not too strenuous. I'd say kids over 12 and any adult that's even moderately fit will be fine. A lot of the riding is on bike paths and even on the road you never felt unsafe, even cycling full tilt down Broadway, which is as bonkers as it sounds and chuffing good fun.
And putting the worlds to right - we did it all; great banter/discussion/knowledge share with Kevin and the group throughout. 2 from Holland, 2 Canadians, 2 Brits and a New Yorker and we felt like we'd known each other for years. Vive la Revolution Kevin my friend.