Ordered my normal size 12 and it fits fine. The upper is comfortable. K Swiss might not be as well know as other major running shoe brands but they make a very nice shoe. This one is even more different as it has vertical EVA foam tubes. It is a great runner though.

It is very light weight. At the same time it is nicely cushioned and handled my 205lbs nicely. This and the Brooks pureflows are two of my current favorites as they offer good cushioning in a low drop shoe. Having tried true minimalist shoes, I found I like the low drop but not so much the lack of cushioning. A Shoe like this a just what I wanted. In the Cali Mari the drop is a zero which other than the Altrus there aren't a lot of in a cushioned shoe.

They run great and despite the sole looking strange, they transition thru the stride nicely and I didn't notice anything strange feel wise from other shoes. I got the green and black pair and they look good as well.