Razorba

Hi again everyone. I have started doing my research and now I know a little about one of the methods to remove back hair. First I decided to find out about the Razorba because that was the first one he mentioned and also it seemed the strangest. And it is pretty strange. I found this website that looks like it was made by the same guy: http://howtoremovebackhair.com/razorba/razorba.html and on here is a description of what the Razorba does. There’s also a video explaining how to use it and a picture. I learned how to put a picture in my post so here’s what it looks like:

And also there was a link to where you can buy it here.
This Razorba might be convenient but it seems very weird to me. How can you shave your back without looking at it? Even if you use a mirror this would be difficult. This design seems uncomfortable and awkward to use. But it has good reviews on their website so maybe it works well. I just don’t understand how. Do any of you understand? Could you explain it to me? If not I’m going to find out about the other methods instead. This Razorba looks interesting but right now maybe too confusing...