Very practical, it has solved my hands, unlocks very quickly and without hassle.

As far as its vulnerability to the electrical system is concerned, I don't know, but a common thief would not get anywhere except to break it!

Its battery lasts a long time!

On the negative side, every time I had to unlock it with the key (I will mention the reason below), the key did not easily unlock it, it gets stuck and the lock does not turn easily.

If it gets wet, water gets inside the "door" where the sensor is located, resulting in it not reading the finger due to the water. One solution is to lock the "door" and have it face the floor when it rains.

EDIT: Don't buy it, it didn't last long for me, it probably broke from the rainwater, so it's not waterproof and won't withstand much. Also, it doesn't unlock with the key, neither one nor the other turns after a while. I only recommend it to those who will take it with them to lock it somewhere outside and not as a permanent lock.