I’m not sure I’d like my wife to have one that is visible. The pressure you would feel when you were out with her, with other couples looking at you thinking you are a wimp.
Maybe one that can be exposed at certain times, high on the thigh maybe, but then the pressure of the summer when the shorts are being worn?
I can understand why the temporary ones are popular.
Saying that, if you want to be the best cuckold you can be, then a visible one is the way to go. Accept and learn. I suppose after a period of time going out with it on show, your humiliated status becomes the norm.