For an iPad Mini, the holder is only about 2 cm too big what in it expresses the iPad does not sit 100% in the holder. What my Verwandungszweck but does not detract significantly since I've been using it for viewing and not for permanent use in the holder.
Basically, the holder is very valuable and can be moved in all directions and locked. Months on the wall was finished in 5 Minunten.