Just curious. I have a keychain token and I am tempted to switch to the phone one. HOWEVER, I seem to have terrible luck with phones. (When I switched my blizzard token to the phone, my phone then broke like a month later...) It wasn't too bad to change the token with blizz, though I had to update my name first because I was married.
But SE isn't exactly known for stellar and bright customer service. I figured I'd ask what people's experiences were first since once I switch the old one becomes invalid.