This device does exactly what it says it will do, it allows you mount and iPad under a cabinet, and fold down/up.
My only issues is with the plastic grip that holds the iPad. First of all, the iPad must be in a hard shell type case. At first I put my iPad in this holder, and it fell out within a few minutes. I purchased a Griffin hard shell case, and it fits in much better. After a few weeks, I had one instance where the iPad fell out. (For me this is a permanent mount, the iPad has not been removed). To fix, I put a little piece of Velcro on the back of the case, and on the surface of the holder, and it has worked much better.
This is the only device on the market I've seen that accomplishes this task, and it does it well once you iron out these items. The metal hardware is very strong.