This system allows to install (and uninstall) Baby car in record time (1 second)! The indicator for proper installation (light and sound) is very reassuring. The base allows more or less incline the cozy depending on the age of the baby and its "activity" (if he sleeps or not). One can very easily pass from one car to the other through the Isofix attachment ... luckily, given the very high price, it saves to buy one per vehicle.