The alarm sound is crazy. It really is hilarious and can be quite the prank if someone decides they just want to pick up your phone and start messing with it. It WILL scare the crap out of you the 1st time you hear it. I tried a few of the functions like remote locking, and remote lock with alarm. Both work great, and both allow you to send a custom message to be displayed. The only issue I had was with wiping. I tested wiping my contacts. When I looked at my phone, they were gone, but there was a weird icon in the notification bar. Clicked on it and it said TOO many items were deleted (about 100) and gave me the option to undelete them. It worked. LOL So, an issue there. But I am more than happy with the lock function if nothing else. Also, the back up works, and you can see SMS messages and contacts through the online website once you have backed up. One thing though, is that after I did the back up, and it could be something totally unrelated, but all my videos disappeared. Not sure they are related, but it happened.