I have a kayline from back when it was just kayline. It is about 6 years old. I run it from Easter weekend to the first snow. I love driving around with the sides and back rolled up MARLIN PERKINS WILD AMERICA STYLE!
I have to replace about 5 snaps/year and the back window has shrunk a bit. I haven't made my own snap rails roger brown style yet. It takes about 1 hour to switch from the hard top to the soft top. The snaps are in the way of the rail to the body screws so you have to take most of those out too.

Specialty Tops is still making 'em and they cost less than CANBACK tops. I think I paid $260 for mine brand new. There is a significant quality difference between the canback and the kayline.