The twist lock was super simple. I promise. Much, much easier than a zipper. I was surprised by how easy it is yet how nice it looks. I say do it CraftADDchick!!! You will not be disappointed.
I have some leftover upholstery fabric in the car, just waiting to be turned into a bag. I might have to hit JoAnn Fabrics this afternoon to see if I can get a twist lock!