Easy security model
I like this Bitcoin wallet because the security model is different and easy. Your Bitcoins, from my understanding, are stored on your phone but an encrypted copy seems to also be kept on Airbitz servers that you can restore to another phone IF you have remembered your password. I think also that you should choose a very very good password so that if someone tries to hack the encrypted copy (be it a hacker, an Airbitz employee, the government, or aliens that have invaded earth or were sleeping underground until now), it will never work.
Odi about
Airbitz - Bitcoin Wallet, v2.0.0