I bought this for my baritone sax. It's much easier to get on and off than a full harness, and I can wear it over a jacket. I'm 6'2" with a 42" chest and bought the S03 (XL size) because I thought the S02 (Large) might be too small for a bari. In fact, I have it on its tightest setting so could have got away with the S02. It seems to be well designed and made to last. The metal hook feels safe, although I'll cover this with a plastic sleeve to prevent damage to the sax.
Thomann gave excellent value and delivered very quickly.