Pros:
- A very unique key with fingerprint feature! No need to worry about losing keys anymore.
- Built with high standard materials which makes it hard for someone to intrude
- Rechargeable and has a long battery life!
- I think 4 allowable user recognition is enough to instill security
Cons:
- I don't see any disadvantages of using this one except if the key will run out of battery. Manual keys can still be used to unlock anyway, so not a big problem