Ok, I'm sold. I'll be switching my projects over slowly, I've already started with OnlyCentral.com and an administration panel. Will be switching my companys tools over as well!
What is Bootstrap?"We are happy to announce Bootstrap, a front-end toolkit for rapidly developing web applications. It is a collection of CSS and HTML conventions. It uses some of the latest browser techniques to provide you with stylish typography, forms, buttons, tables, grids, navigation and everything else you need in a super tiny (only 6k with gzip) resource. Check out Bootstrap on Github."
In short, it makes your life easier for both simple and complex web development along with providing fantastic cross-browser and mobile support - for no extra effort by you the developer!