Because the units operate on the same frequency, my grandsons were unable to race, compete or play with their new all terrain vehicles on Christmas day. It was a disappointment.
Our six year old son loves this toy. The only issue is that it does not go forward quickly. But that is made up for by the speed with which it goes sideways. It is easy to use and maneuver. It is a little time consuming to get the battery out to recharge, but we have not had it long enough to know how often we will need to recharge. I do like the fact that it is rechargeable though.