STYLETHREAD -- LET'S TALK SHOP!

I did a search, but only three topics came up and I was hoping for more info.

I'm in desperate need.  My teeth are not gross, but I've noticed my coffee drinking is finally catching up with me.
The whitening strips sound kind of scary considering I have super sensitive teeth.  I read someone got holes in their gums and I'm petrified!

Any experience with the trays or anything else that haven't bothered your sensitive teeth?