I don't carry life alerts. I carry a fucking .45 like a real man.
I don't see the point in them really. If you're raiding, you don't want to be revived cause you'll get arrested. If you're getting raided, they'll finish you off anyhow, and the cops/medics will find your location from the gunfire regardless. I understand how they can be useful in some scenarios, but I like to stay off the grid unless I'm on duty as Lt. In which case it doesn't matter because cops always have them anyway.
if you're a naughty criminal who likes to partake in criminal activities then don't bother. However if you're like Louise Love and fanny about all day doing no such thing then still don't bother because they're inconvenient and most of the time it's a burden to other people