While I do not have it I did look at one to see if I wanted to add it to my order and it appeared fairly secure. Having said that not sure it matters, I mean is someone really going to break into a truck hoping it has under seat storage and that valuable are looked in it? Or more likely are they going to break into the truck that has said valuables siting on the seat just my thoughtsFor those who have the lockable under-seat storage option, I'm wondering if you can advise how secure it feels? Would you be confident locking your valuables in there without fear of someone being able to "muscle" their way into it?