Looks interesting. Usually saw blades on the spine of a blade of any kind are useless, at least from my experience. I would rather have a smooth spine. For the price or maybe just a little bit more you could buy a decent blade, hatchet and fold up saw that will do what each is designed for very well.
"Woodsman's Pals" are cheaper and will do just about everything that will, and have had good reviews.
Just my opinion though. It looks like it would be cool to try out but for the price I couldn't justify spending close to $80 for it to just try it out. If knifetests would do a torture test on it and it performed well, I might consider though....