I have use them for more than one year in an average-weight bass and still it feels solid and trustable, very easy to install and I could use the same screws that were on my bass so they have been in the right position since then.
My only issue is about the part that goes in the strap, the inner piece that you have to pull to unlock the strap tends to vibrate when I play, nothing disturbing if you are on a gig, but very annoying if you practice at home.