Just got it from the mail.
Confirmed that it works as advertised.
It comes in a nice box with 1 fob with the word "Tesla" on the back (not older word "Model 3") and 2 Panasonic CR-2032 button batteries.
It's disappointing that it does not come with a keychain for the price of $150 plus tax so I have to take time to buy one separately.
The programming is straight forward: Place your fob on the cupholder and it asks to place a keycard on to confirm then it will appear on the screen as "unknown key" and then you can edit its name.
It acts like a key card or a phone except that I don't need to take it out of my pocket to approach the car or walk away from the car.
Approaching the car seems not to create any reactions, no lights or noise for acknowledgment but when you push the handle to open, that's when it automatically unlocks for you.
Walking away from your car would result in a brief horn noise to confirm that it's automatically locked.
Of course, you can double click your fob to open doors, frunk, trunk or single click to lock.
Very nice over all!