I booked this after reading the reviews on Tripadvisor and I want disappointed. The offices are a little difficult to find but our cab driver saw us safely there. On arrival we were briefed in a beautiful, cool garden and fitted with bikes and optional helmets. My bike frame was probably a bit small for me but it was a very comfortable "sit up and beg" style.
Having been in Bangkok a day, I was a little apprehensive about the traffic. I needn't have worried. Our guide went at a steady pace, guiding us through tricky bits and making sure everyone was comfortable. The other road users are very considerate. I am not an experienced cyclist and so I think even confident beginners would enjoy this tour.
The tour goes through back alleys and markets, along the river and utilises the ferry. We saw sites away from the main tourist drag that we would not have seen on our own. Our guide was informative throughout. There are plenty of photo opportunities and rest stops and you are supplied with ample drinking water.
About 24 hours after the tour we were emailed photos the guide took of us during the tour. There were some great shots. Only added extra that I would have liked would have been a map of the route, highlighting some of the sites to take away with me.
Overall, highly recommended.