Koala KareProducts KB425-04 Cinema Seat,Blue

I had one of these before, or I should say an older model. This one on the other hand seem a little too big for the standard size theater seat. It only gives about half an inch or less if you try to center it. When my boy sits on it, it moves a little to either side and falls in to the side of the theater seat, then he is sitting sideways at an angle. He hates it and still ends up on my or my wife's lap. I tried it at two different main theaters. Another thing is why the heck is it on Amazon but I have to go to another site to order it? I should have know better. I don't even want to deal with a return since it was not Prime. Maybe the 5th, in over 5 years, product that I have ordered that is not Prime. DON'T BUY.