I started with including bootstrap linked from github to try it out and ended up keeping it. Ended up writing an entire weekend project in it. It's a great way to simply organize your site and keep it looking nice.

If you're a themeforest person you can totally use bootstrap to override for better form elements and still enjoy a decent theme.

It's seeing a lot of nice updates regularly too, which is nice. I was really happy to see the drop down menu on the menu bar.