I've used BS2 and 3 in the past, and wouldn't recommend bootstrap at all these days. You're better off with something like Bourbon which is much more modular a

I've used BS2 and 3 in the past, and wouldn't recommend bootstrap at all these days. You're better off with something like Bourbon which is much more modular and lightweight and doesn't force you into a certain "way" and eventually down the "override everything" rabbithole.