So many of these CSS frameworks claiming to be "dead-simple" and "responsive".

From the first page of https://www.google.com/search?q=minimal+css+framework, we have Milligram, Pure, Base, MinimalCSS, Bulm, and Skeleton. There's even a GitHub project which catalogs this: https://github.com/neiesc/ListOfMinimalistFrameworks#framewo...

So my question would be: what sets Wing apart and why should I use it compared to all other grid-ready, responsive, minimal frameworks out there?