I have been using Schaller strap locks for 30 years, and have always been happy with those with one exception: the nut tends to get lose over time, and can fall off entirely if you don't pay attention. Or use loctite threadlocker or similar, which is what I did.
The Dunlops don't seem to have the same issue, and they are even more convenient and easier to release in my opinion.
The Dunlops will be my go to from now on. Highly recommended, cheap insurance for your precious instrument.