This was a Birthday present for my 4 year old. Firstly it caused big fights between my 4 year old and 3 year old as they were both so desperate to play with it.
The track is really good with an inner and outer oval controlled by a set of points you operate manually. The inner oval has a suspension bridge, which although initially fiddly to build the first time, is easy once you get a bit of practice. It comes with a station and a few trees and a small tunnel. There is a section of track where they can stop the train at the section, which proved a big hit.
The steam Thomas was great fun and entertained the boys for ages. My only gripe is the pipet to re-fill Thomas with water split very quickly. Also you go through quite a lot of batteries. The only other issue is that the Thomas and first carriage are permanently joined as they are wired together. My 3 year old enjoyed carrying Thomas around and it didn't take long for this connection to break. First the plastic broke and then the wires pulled out and I cannot fix it, so Thomas had to go in the bin. I haven't been able to get another Steam Thomas, but we have bought some of the other trains that are available (no others have steam), but they seem to be more robust.
In summary the boys come back to this toy time and time again. If you can look after the Thomas, this is a great buy and will entertain for hours and you can buy extra trains and accessory track parts.