I really like these shoes. I previously was wearing the N1 version and like these better with a little more cushion. They are comfortable and really feel light on. I ordered a half size bigger than what I wear in street shoes.
I prefer this roller over a solid foam one. The hard plastic tube seems to offer more consistency in the pressure. It also makes it more convenient for travel and use in small spaces as the inside can be filled with smaller items in your luggage.