Below is my opinion about Gate Smart Lock, I'll try to explain what I like and dislike about this gadget.

Pros:

• the lock allows you to create temporary keys, that's a great feature that some people might need
• equipped with a camera, allows you to always see who is at the door, another great feature that other locks should have
• doorbell that calls your phone
• open the door from anywhere via smartphone

Cons:

• the price of the lock is kinda high 349$, if you have 2 or even 3 doors that lead into your house it will be expensive to handle each one
• battery 49$, a battery will wear out in time and their life time will be smaller and smaller, sooner or later you'll have to replace it

Other then that the gadget is "Wow" and useful.