Originally Posted by yolanda
I used this once in a class and it worked great... later my friend told me she didn't think it was a good idea to "crush" the cotton fibers ... but boy I sure liked smacking those seams down... the back of my quilt looked incredible too... I am too nervous about crushing fibers now to use one.
You won't be harming your fibers. You don't hammer the heck out of it. I've seen people iron with steam so hard on these spots the fabric turns shiny so I would rather tap my seams than burn them. Many people with way more experience quilting/sewing than I have say they have used something similar for years.