I checked as mentioned, works great
But there are some loopholes, test cases-
1. Detached gmail account in phone,
2. Diconnected wifi and mobile data.
In both cases, location was unavailable, and it didn't ring,
Erase data not tested in both cases
Now I am sure this was expected as gmail connection is required.
And I would myself recommend people to turn this on, but it is surely not completely secure.
Anybody stealing your mobile in a good state of mind would remove the sim first.
And if he is not able to crack lock code, then he would go for software reset.
Only case where this thief would get caught is if he/she is roaming around with your phone w/o software reset and modile data is on (as he cannot connect to new wifi with mobile locked), or if mobile is unlocked and thief doesn't care to remove gmail account.
I am looking for better alternatives, while having this turned on already as it doesn't even need any app installed.
Misplacing phone with no one around to call you ? This will rock