I've seen terribly designed stool-backpacks and had one that hurt my back if there was any real weight in it, but the ease-of-use, comfort and look of your's are unmatched.
One has to chuckle at the irony that office desks were made for the context of sitting, and now everyone wants to stand at one. Backpacks were made for the context of on-the-go, and now people want to sit on it.
RiteKit Company Logo API
Auto-Hashtag API
Product Hunt
Game of Spoilers
Gulp
Auto-Hashtag API