anybody know anything about locking/"secure" mailboxes?

Anybody know anything about "secure" locking mailboxes, as in, which are decent and which are junk, and how to tell which is which? We had a set of bills stolen so I want to get something which can help with that. this model is at Home Depot and some of the neighbours have them, only in black. (I'd get black too, white mailboxes in our climate == filthy.) It's Mailsafe model RSKW0000 if the link doesn't work, which it probably won't because Home Depot's website can lick me where I pee. Someone on the way to the shops on Goat Trail Road has one of these, and we'd think about getting the smaller one. Are either of those any good? Does anybody know how I'd go about even finding out?