I think it is rather inventive. Its is halfframe 6x6 instead of halfframe 6x9 Just like my olympus pen EE cameras are halfframe 35mm.

I think it is quite amazing that you can make 24 high quality "panoramic" images with it on just 1 roll of 120 film.

Winding with one window shouldn't be a problem, you just have to know which dot to stop at between the dots that have numbers... I think 4.5x6 uses another system because there isn't a dot at the exact right place on the backing paper. Not sure about this.