Owned one for the last 3 years (Up for sale too, I'm getting a Dye pack as a birthday gift
). Honestly the hinge is a nice feature, but i never seemed to use it unless things weren't sitting right on me. The double belt, standard now it seems, is wonderful, and it sits very nicely with little to no movement what so ever.
Only reason I'm selling mine is I wanted a larger size (4+ as opposed to 3+)