Wunderbars are designed with simplicity in mind. It doesn't matter who you are and what your background in canvas stretching is, with a little pointer on the corner folding, Wunderbars can be picked up and used by practically any one.
Removing the need for skill in stretching is one thing, however, even with no skill your newly stretched canvas frame looks as good as any professional stretch.
So what are the other reasons for choosing Wunderbars. Here's a list of things you may or may not know about Wunderbars.
1. Super fast stretching
2. No tools required
There's no machinery or weird medieval looking tools with Wunderbars. If you know how to hold a staple gun, you know how to stretch a canvas. When you slot the bars together you do not need to use a mallet like traditional methods, the holes on the bars are slotted to just the right size so that they slip in with ease. Next, you've seen stretcher pliers right? More suited to the Spanish Inquisition than stretching canvas in my opinion. With Wunderbars the bars do the stretching for you without the ripple effect you can get with pulling things too tight (or loose) with pliers. Finally, no wooden corner wedges (keys) means no hammer. With Wunderbars you just pull the corner pins and watch as it stretches.
Wunderbars also does not use - Glue, tape, plastic jigs, metal corner thingies, large expensive machinery parts, sentient robots.