Yes, skeleton is extremely simple and light weight. Most of the components are very basic which is good.
I don't like Skeleton's grid system. There are very less options for smaller devices. Also, sites built with Skeleton will have a maximum width of 960px (you need change this manually on the CSS file).
Also, Skeleton doesn't have many customisation support on the Less and Sass version. Hence, if you use Less or Sass very often this might not be useful for you.