I'm not a fan of strap-lock buttons. Honestly, I prefer the "clip lock" strap solutions.
However, this set in particular has found a way into my heart.
The looks are amazing: you'll be able to find a perfect match to the hardware on your axe.
It is sturdy: it will stay in place no matter what.
It is easy to use: just press and attach... press and detach. Virtually, dummy proof.
It might be a little tricky to install, for on most situations you will have to trim the holes on your favourite strap. But other than that, it's just fine: place and attach the pressure-washer.
One thing that turns me down about strap-lock buttons is the size of them. However, Dunlop has tackled this issue by designing a female button that goes INTO your instrument! So, the end of it stays flush with the edges of your guitar or bass.
Yes, you have the inconvenience of having to drill the wholes a bit wider, but that's an fairly easy (albeit messy) job and once installed, you just forget everything about it.
I strongly recommend it!