Well a couple of months ago my question was Foundation Zurb vs Twitter Boorstrap. Now my reply to this question is just anyone. I was very anxious which one to use, which one will help me build my project easier and of course which one is more flexible to custom designs as we don’t use templates or other ready made designs. In Stereotropism we build custom hand crafted designs for our customers. It was a headache for me and I made a good research reading tons of articles and suggestions from web gurus. Well if you want a short and quick answer then go for any of these two or another one like Gumby, Skeleton etc.