I have never tried hanging my guitars before. We used to live in a large two-floor apartment with plenty of space. I dedicated a bedroom solely for my guitar collection, so some of it are just propped on the wall. When we moved to a less spacious flat last August, I had problems with the leg room. The only solution was to place the guitars on the wall using the hanger 2.
I found them pleasantly stable, easily adjustable, and sturdy. At first I was afraid that one hook would give in, and my precious would crash on the ground, but no such problems occur. Even if we move to a bigger space in the future, I would probably hang the guitar again. It looks cooler that way.