I chose this set as my son is 4 and it appeared to be specifically focussed on younger children to get them used to Scalextric. However, the only real difference, apart from quality, is that the sensitivity on the hand controllers can be adjusted. It's many years since I played with Scalextric track but, on opening the box, I was disappointed by the feel and quality of the track and components. My concerns were realised when we put it together and tried to use it. Neither car would complete a full lap before simply stopping. I am an electrical engineer so I checked all of the track connections and the external contacts on the cars but there was nothing obvious, so I can only presume that it was a problem within either the cars or controllers, or a problem with the track overall which, as I said, was pretty poor quality. I'm just glad that I hadn't spent loads of time putting the decals on the cars (no, they don't come with these on already).
The other issue with this set was the 'Lap Counter'. This operates on a mechanical system with a small lever in each track to detect the car as it passes. However, on the occasions when we did manage to get a car running past the start/finish line, it was thrown off the track on every occasion by this lap counter lever.
Overall, therefore, I would not recommend this set and, from the wider reviews of Scalextric Start sets, this line of products seems to be way below acceptable quality. Obviously some people seem to have been lucky and received a working set but I do think that is down to luck as the product is certainly not robust. Also, I have now just received a 'proper' Scalextric (for less than you can now buy this 'Start' set) and my views of quality have been confirmed. This 'real' Scalextric is much better. The track, and especially its connectors, are of a much better quality, as are the rest of the components. Also, despite my concerns about how usable this would be by my son (aged 4 (almost 5)), he has taken to it easily. Therefore, I strongly recommend ignoring this 'Start' line of products and going for proper Scalextric. You can pick sets up for much the same price, if not cheaper; they are far more likely to work 'out of the box'; and they will be far more enduring as they do not need any adaptors to work with the rest of the Scalextric range.