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It works exceptionally well on the existing infrastructure (which is necessary). Two pins need to be connected to the existing board where a simple button would go. Essentially, it is a homekit smart button. There is also a cheaper version without homekit for those who do not need the Apple ecosystem.

Finally, the magnetic sensor it has to detect if the garage is closed or open is made of plastic and requires a very small distance (during installation, my garage door pressed it and broke it). I replaced it with a metal magnetic heavy-duty sensor that is designed for garage doors.

Seemingly it's OK but when the AirTag gets detached while you have the keychain with you, it will disappoint you. It happened to me in a parking lot where I left the keys with the valet and the AirTag fell off the keychain. Generally, the AirTag easily comes off the keychain. Get something else that is tighter.

There are probably many "qualities" available. I happened to get the bad one. The graphics are very poor, blurry and pixelated, and it also smells like rubber (bad odor)

The quality of coloring, both on the marks and on the cards, is mediocre (the coloring is not uniform and it is also faded - dull). However, the material looks good, and they are quite heavy. For the money, this whole set is decent.