In my case Bootstrap is very handy for prototyping and getting apps to a certain level of functionality before applying the final look. I always end up skinning

In my case Bootstrap is very handy for prototyping and getting apps to a certain level of functionality before applying the final look. I always end up skinning it to a very specific product requirement, and in some cases I end up using only half of it. To me what makes a project look bootstrapy is the buttons and fonts, so if you can brand your own, that helps.