Has anyone purchased the Creative Feet?

They have a website and videos that demonstrate the 3 different feet and I saw them at the Novi Sewing Expo.

They would be worth it it they perform as well as the videos show, but they aren't cheap.

Here is a link to another discussion here on these feet. The inventer of them even joined in :D:D:D

http://www.quiltingboard.com/t-66221-1.htm