Installation was very easy and everything we needed was in the box. Adding fingerprints was easy and could be added for multiple fingers and multiple angles, ensuring my finger would be recognized even if I didn't press it exactly the same way every time. My 5 year old has a small problem with the fingerprint sensor, but we are still with him at all times. However, my older child has no problem with it. The app worked well for adding new fingerprints. One idea for future improvement is to allow the app to connect to the device over Wi-Fi in addition to Bluetooth, so I can access fingerprint logs and unlock the device from anywhere in my house, rather than just within Bluetooth range to have to be located. Another recommendation I give to the manufacturer is to allow the user to set a code length of less than 8 digits. When using the code method instead of the fingerprint method, entering 8 digits is too tedious. You can recommend 8 digits, but you should allow the user to choose less if they really want to (e.g. 4 digit code). Overall, I am still very happy with this purchase and would recommend this product to others. I also like that it offers multiple methods to unlock (fingerprint, numeric code, physical key).