A company I'm working with is moving toward implementing Test Director's bug tracker. Because we have a site license for TD, we will have the entire team using the system (100+ people).

1) Anyone using Test Director for their bug tracking? If so, are you happy with it?
2) If you're not happy with it, what are the problems you've encountered?
3) Are we severely limiting ourselves with this solution? Anyone have any horror stories you'd like to share?
4) Anyone have any success stories with TD bug tracker they like to share?

Thank you.