It could use a bit of improvement. For one, the home button should not close it. Second, I dont like that it beeps as it counts down. I feel it should either be completely silent or maybe do a single chirp like a car alarm. The 3 2 1 countdown beeping is annoying and doesnt really suggest you have any sort of security on your phone. A single car alarm style chirp might be a little more intimidating to a would-be thief.