I've also deployed a few Yubikeys and while they are the most versatile tokens I've encountered, at least for my use case something else won me over: They're an

I've also deployed a few Yubikeys and while they are the most versatile tokens I've encountered, at least for my use case something else won me over: They're an order of magintude cheaper than RSA tokens. More, actually. That makes me put them places I wouldn't otherwise.