When the 19er came out I was a bit skeptical and found the shoe ugly compared to the 4.0. Having said that, I have to say that not only are they more comfortable than their predecessors, the style will also grow on you. Now I prefer them to my other Ultraboosts. Regarding the size, I wanted to increase the size from 4.0, but it fits the size. Knitwear has become slightly stiffer and has improved performance. I received so many compliments on the crystal blue color scheme. If you like the previous versions, these won't disappoint, but there's a short period of customization.