I use it for at least 10 years old and I bought a pair with any new instrument.
The system installs in 3 minutes by the clock with two shots screwdriver strap is secure and safe instrument.
If like me when you're on stage you have genes that emerge jumping beans you definitely need this system.
Only downside, think to tighten the nuts from time to time otherwise we risk to lose and they are not easy to find, why I only takes 9.
I've redone this choice and I will do it again for my future instruments.