These stands do the job. But I find the clip/closure mechanism around the next a bit annoying every time you want to pick up the guitar. Not good with nitro-cellulose guitar ) which I think it says) - so not so versatile if you have a variety of guitars. Personally I think better to spend a bit more on a stand that will last longer and do the job better.
After using guitar stands without a stabilization for the neck I tried this one. All my guitars fit perfectly in, but they are all stratstyle instruments. With a flying V or an Explorer this stand isn't right for you.
The stability is pretty good.
The closure mechanism is pretty cool, because it saves the guitar from falling, but sometimes it would be better to have a mechanism, which made it possible to just grab the guitar without any more "unlocking" to do. But for this price, you can't expect more than this.