Welcome to the Quilting Board!
I love the Supreme Slider. The adhering side will revive itself when rinsed under running water. All threads and lint will slide off with the water. I have had one for years and it is still like new. So yes it's worth the price to me. Look for online sales.
damaquilts where did you find the sew slip 11 with free shipping. I've got to order one as I don't have one yet. Do you care to share?