Duncan did a great job on providing us an indepth tour of Valencia. He went over the history of various hidden gems of Valencia that you normally wouldn't have noticed. He also suggested many local tapas, cafe and paella restaurants along the way.
We took a break half way through the tour to sit down and have some coffee. After the official tour was over he offered to take us into the Central Market to point out various local specialities. He even helped us getting a last minute reservation at a popular local Paella restaurant.
Don't let the lack of reviews turn you away, Duncan is a very experienced and personable your guide.