What's good about bootstrap: better documentation than Foundation, decent approach for the grid system.
- What's bad: too many styles you hardly ever need. Ok for proof of concept, not so much for most projects;
- No equal heights in their JS - foundation has this and it helps
- Poor attitude towards requests and comments from "users".
Frankly, if I have a say in it, I just use the grid system and not even look the rest of it up.