I have three of the Cannon safes at home, a widebody and one a friend recently gave me in the garage and a narrow one upstairs. All three have electronic locks and all three have worked well. Our office also has one widebody in the armory for spare patrol rifle and handgun storage. This, too has been flawless since day one.
The Cannon safes, I will admit, are not the heaviest-duty ones out there. The doors and walls aren’t as thick as other higher-end safes and that fact is reflected in the weight of the units and the heft/feel of the doors when being opened. That being said, for the vast majority of home burglary/gun-safe situations they are effective. For an equipped, dedicated burglary crew or a true professional who is targeting the gun safe specifically, the Cannons really aren’t going to hold out for too long.
Stay safe.