I absolutely love these, I have these on all my 5 guitars. Low profile, very sleek, and 100% rock solid when in use. Very easy to attach and detach, no more fiddling with Schaller-type locks. I urge you to try these out, as far as I'm concerned these are the best of the bunch, and I buy a set with every guitar, as I consider them essential!
My only criticism is that the included tool is a little bit small, so attaching the locks to your strap can be somewhat fiddly. But once they're on there, it's happy times ahead!