I use these on one of my guitars and it's the best strap locks ever.
Never had a problem, it holds well and you never fear your guitar migh fall. It's super simple to use, much more than other complex systems.
I recommend these if you plan to keep your strap on your guitar all the time - I don't ever take them off.
The quality is nothing special, but the practicality is great. I only use them on more modern looking guitars, I don't use them on my vintage looking guitars, cause the strap locks aren't the prettiest thing, and look really out of context on them.
Strap locks are the essential for any gigging musician, but I (like others) didn't want to end up drilling holes in my beautiful guitars. For a tiny price, these locks make sure my guitars aren't covered in scratches and dents from being dropped. Peace of mind is worth it in this case.
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