NO matter how tightly you rig it, it will always be a projectile flying object hazard in an accident, possibly resulting in severe head and facial injuries to the child. That being said, I have one rigged in my mini-van. It's as tight and secure as I can get, and I'm taking the lesser of two evils. For me it's a matter of having my almost two year old scream for every car trip as he knows my older son has his overhead dvd. My two year does not sleep in the car. So, the driver's nerves can be shot due to excessive non-stop screaming, or I can take the risk of the dvd coming loose in an accident. Anyway, I'm not reccommending it, especially if you have a lower key child who will fall asleep anyway, but I do it.