I've never bought one of the HF ones, but have looked at them. The concept is pretty basic, and it may not be SnapOn quality, but seem to be fine. All of them are simply a rack that aligns tape with paper so that when you pull them off they self-adhere.

I agree that they make the work easier, we used them at the body shop constantly. I think the HF one is good for the money, and may pickup one myself now that you have reminded me.

Don