I was considering getting one for backup purposes (not for spying on people!). I live by myself so I wouldn't even have anyone to spy on anyway. For those of you who use them, what kind do you recommend? I knew there were software kind, but I had never heard of Acoustic Keyloggers before. That's pretty insane... just from listening to the sound of your keys? wtf? Is that a real thing? Sounds like some CIA Black Ops stuff! Alright what do you recommend.