I think it's the greatest thing ever. Want to get access to that coupon code or get a hold of that whitepaper but DON'T want to give your real email address and endure a lifetime of SPAM and your account being passed around like a cheap h****r on a naval ship? Get an email address for 10 minutes so you can respond to the email verification and get access. Then it disappears without a trace.
Source: http://10minutemail.com/