I'm using one and have mounted it to where the strut meets the wing via the suction cup. Its come off once, luckily I had it cable tied to the tie down hook. This is attached to a caravan with IAS of 140.
The one time it came off was at 3600 ft. Have taken it up to 11,500ft with no worries.
The 3M tape mounts I doubt will ever come off! Dunno what the boss thinks about that though...