I've never tried the backbone...but most everyone seems to like them. I don't personally feel I'm missing anything with the standard model in my usage.
(Generally Duluth Fire Flex cargo pants and shorts.)
Not Blues, but I have 3 backbones. Understand that if it's warm, you're going to have sweat/condensation (I'm in a humid AO) beaded up on the exposed part of the cylinder that's against your thigh. One reason that my pocket wheelies are nickel or stainless.
"It's surprising how often you start wondering just how featureless a desert some people's inner landscapes must be."
-Maple Syrup Actual