Seriously, someone set a marathon time world record in these things or some such.
So do they live up to the hype? Yes and no.
These are extremely well made running shoes with TONS of cushioning. The average distance runner might find it a little jarring at first. THE SOLE IS HUUUUGE. I cannot stress this enough, it's like walking in high heels or something. On the plus side, they do make you taller.
There's also a crazy amount of bounce to these things. And an air bubble. When running in them, you definitely feel propelled forward in a way that no other shoe I've found can match. If you're a serious distance runner these are definitely worth a look.
The bad? These shoes are very narrow. They are also somewhat awkward when moving side to side and were definitely made for the one sole (pun intended) purpose of running long distances in a straight line. They are quite comfy.
Recommended but expensive and not for amateurs.