They have a video on their site of letting 2 boys, although younger than 12 imo, try to get it open, I cannot remember the time lapse before they gave up.
Biggest glaring issue I see is when it is open the lock combo is visible, IE they stay in position.
The newer version I don't know if it has 3 click levels or 4, would be interested in how that tactile feedback of the buttons are.
I see uses for this though as a mobile protection device, also doesn't have to be exclusively for fire arms.
They really need to solve the buttons resetting when closed. I read concerns of a lack of key also, The Bulwark edition has one. They also have something for (I cannot remember the name) it is not a trigger lock though.
I think this would keep smaller children from accessing fire arms from less responsible owners. IE " stay off my lawn, stay out of my room, stay out of my closet.
Also may prevent theft from a vehicle, if it's not in plain sight.
Just my opinions, was curious what people think.
EDIT:
Just watched a changing the combination video, yea there would be ALOT of lazy enough people that wouldn't bother.
Edit edit: The finger positions while open, I would say from watching my grandaughters grow, would catch that pretty quickly. Imo fatal flaw. no pun intended.
I think this would be decent alternative to keeping some private stuff from say a room mate, IF you actually go through with altering the locking sequence.