First off I have many of these hangers, and I use them for all instruments! I am currently hanging acoustic guitars, electric guitars, a bass guitar, banjo and a ukulele! They really are versatile.
They attach to the wall with ease, with the need of only two screws. This not only makes for a stress free experience putting them up, but also taking them down to move them. I have moved mine a few times, and the walls are only left with two small holes which can easily be filled.
These hangers seem to have no give or flex in them, being very solid. and I feel confident hanging my instruments on the wall, with no worry of them falling off!
They are definitely the best way to store your instruments, keeping them off the floor where they could get damaged. They also look awesome hanging on the wall next to each other!
A must have for anyone with a bit of wall space and a love for guitars.