Well the charger works and even the jumper clips are of high quality. But the circuit breaker included in the kit has not yet been melted down with the highest quality wire. I've had a few and would be happy even if it weren't included, but for younger kids an older truck or bike that vibrates will be better served by a better quality quick coupler as the one supplied doesn't work in a few years. in outside weather and a hot wire on the battery can cause a short circuit even if it is burned out.