Yes, it is easy, but it depends on where you mount the box. I have mine on a high closet shelf where I can't even see the keys, but I can reach up and put my hand in the grooves and tap-tap-tap and the door opens. This is kind of cool because just looking at the box where I have it, you can't even see the keys, so a child or intruder will have no idea how to even start to work on it.
You can program the keypad so you have to use more then one finger at a time too. For example: Ring & Pinky fingers at the same time then index & pinky fingers.
If you mount it close to the floor, I would suggest mounting it upside down (keys on bottom) or door up (keys on side). If you are right handed, you could also mount it so the keys are on the right-most side of the box. It really does work, but I would just not mount the box where you wrist is bent backwards to do the keys.