I think mobile wallets are very easy and comfortable to use. They allow you a very fast and convenient way to access your coins, since most people carry their mobile device with them anyway. On the downside, mobile wallets are the least secure form of Bitcoin wallets. When downloading an Android wallet for Bitcoin this means that the private key will be stored on your mobile device. And if the device goes missing, so does the private key.
I think the biggest problem when using a mobile wallet is in case your device gets stolen. In such a case, an experienced hacker might gain access to your coins quicker than you will be able to recover them.
So, what do you think about comfort vs security while using mobile wallet?