Well, there are differences between use the belt as a tool, and to want make the belt a part of your life.
At first it seems you wanted a tool, I mean, I have a problem, I need something to solve it.
Thigh bands... It depends, I wear them, but wear them need a effort for your keyholder and your own.
There are a lot of things that it is not recommended to make with them, so, you will need be released with frequency. "Normal" life without releases is very complicated.
And about keyholder, yes, I bet for parents in first moment.