I've only been quilting for a little over a year, but I'm very skeptical about this product. For starters, I went to the website and couldn't find a video demonstration (tho it's entirely possible that I'm at fault.) The only video I found cost ~$10!
That said, I have found that making and attaching binding to a quilt is the easiest step of all! While I've spent many $ on supposedly premium gadgets over the years, most have been great disappointments. Most sellers of same target those of us who question our skills and our ability to learn.
I strongly recommend that you save your money and learn to bind your quilts without this product. If you like, I can tell you how I do my quilt bindings. Others on this site can help you, as well. There may also be tutorials available if you use the "search" engine on this site!
Sushi