Good design is able to help you simplify your life in the smallest of details to the point where you wouldn't notice a difference, until you go back to your old habits that is.
Keysmart is one of these products. I've seen similar products on kickstarter and other places as well and quite honestly, they all function the same way. It really just comes down to what your aesthetic is and picking the one that suits your style the best.
Keysmart is the one key organizer that looks elegant and clean in my eyes and I am pretty sure that I'll be making a purchase soon. As ridiculous and exaggerated as the video may portray the uncomfortableness of stuffing keys into your pocket, it's really quite a nuisance. The idea of having all my keys tightly packed and not stabbing my thigh is such an enticing one.