I don't like relying on security through obscurity as the only means of keeping weapons secure. This applies to both weapons on your person as well as in your home, but that's another topic.
Many states have laws requiring firearms be kept locked in your home if you have kids. Even if you don't have kids there's always the chance someone else's kids or a friend clueless about firearm safety finds a hidden firearm. Products like the GunVault still provide quick access while helping prevent tragic accidents.
Keep in mind small weapon safes are only designed to keep out casual observers. It's very easy for a burglar to pry open the door or just rip out the entire safe and open it later. A hidden weapon safe may not be totally secure but it's the best that can be done.
I have and like the GunVault. If you get one, buy the deluxe model that uses both batteries and external power. Don't rely on just one power souce.
Biometric devices may be neato tech but (at least right know) it isn't reliable enough to trust your life with. If your finger is too dry, too wet or positioned wrong it won't work.
The GunVault has buttons in four grooves you put your fingers in. The idea is you place your entire hand on the safe and then tap out the combination. I don't know about current production, but before the company was bought by Cannon the deluxe model allowed you to enter three different combinations. I chose three combinations (eg. 1-2-1-2, 2-3-2-3 and 3-4-3-4) that would allow me to enter the code without having to position my entire hand first. In a panic situation any time you can save is good.