they absolutely work, i recommend the one in my sig., they aren't worth getting if you aren't going to wear it at least 4 hours a day and if its not comfortable. I used 2 prior that weren't comfortable, couldn't wear them for 4+ hours.. so they didn't work.
Do you want to get rid of it?
the new(er) ones have soft plastic/rubberish straps... way way better than the traditional straw-like nooses that PINCH your dick!