Good concept with minor errors

We bought the Kopfstützenhalter of Trust for the upcoming holidays, so the children can be kept entertained better. Overall, the holder is well done, by the infinitely adjustable headband he really fits behind each headrest. The panel surface to hold the iPad really good, but can be good again remove.
The only - for me but really relavantes - shortcoming is the mount between the headrest bracket and the panel. For that is very easy and can be used alone already by careless children legs (so what should it indeed be) cause the iPad falls to the ground. Normally I would rate as a product with a star, the problem could however be solved by a piece of paper and now it holds bombproof. I maybe know if I just had bad luck eifach or whether this is a systemic error, there are 3 stars