Envelobox Creator
Seriously works just as it should. Easy to use!
But I must admit I did have to use utube on how to use it.
It comes with an instruction book, but it was bit confusing at first.
you place the corner of the paper in a V shape, but the V has 3 or 4 more "V"s not sure why? Or when you would use them. If you make sure its lined up correctly each time you turn you will have success.
Very happy with how easy to use.