Good timing for your review!
I'd never heard of this notion until yesterday, when i saw it in a video online. Looked intriguing. It does also come in a 2-1/4" strip size, which is what I would get if I was buying one. A couple of years ago, I bought the silicone mat that has slits in it, feed fabric in, set iron on top, and just keep pulling the strip. If I didn't already have that, I'd definitely be looking closer at the Magic Binding Tool.