Excellent heavy duty mount for the ipad. We use it with the square credit card reader but, it only works with the old magstripe reader and not the new one as the new one is little bit bigger than then old one. Another thing is, it does not stay in place, it keeps tilting downwards whenever the ipad is placed in it, I don't know if there is a way to tighten it.
These are exactly what we needed. They look nice, are very sturdy, they lock, and have the home button covered for a kiosk environment in a museum. We mounted them without the arm bracket straight onto a wall. We did have to come up with a solution for the sides, since the cable was within reach for visitors. Luckily the 3d printing studio down the street printed a solution for us.