I use Sure, which is ok. I've wanted to try the driclor stuff for ages but something about it just doesn't seem...right to me.
I've heard people rave about it though, so might give it a go.
It's probably bad for you, it in effect blocks all of your sweat pours under your arms, or wherever you use it. It does, however, work very very well. I don't sweat unless doing a proper gym workout when using it.
Gillette. Doesn't stick my pit hairs together.