Personally, I think I have tried all the existing systems. Hated the dice neck strap my first reflex, I enjoyed the wrist strap which I have tried many models, but I feel it makes my less ergonomic camera because I sometimes struggle achieve some buttons. I did not want to have a dattache too complex system that would add my weight and that I would have fits in my bag when I never enough room.
The "Joby DSLR Wrist Strap" belt is an interesting solution. Simple and lightweight it fulfills its main function without problems prevent the device falls in a stampede or when mishandled. It is not necessary to tighten around the wrist since it thereby automatically. The rest of the time, nothing hinders the use of reflex. Aesthetics, the product is of good quality, the finishes are correct, seams and rubber ties seem solid. This product has nothing to do with the compact belts, we can not worry entrust a reflex amateur or professional.
One idea for the next version, add an attachment system for tripod screw-type power tie under reflex.