If you want high security, get a lock from a trusted brand (e.g. ABUS) with a thick hardened steel shackle.
If you want convenience (e.g. no key for a gym locker), get something like a WordLock: https://www.amazon.com/Wordlock-PL-056-SL-Combination-Sports...
No need to spend $100 on a lock to save yourself 2 seconds unlocking. Maybe I'm missing something, can anyone can think of a better use case?
Preferably not the one shown here[1]
I rent workshop space with several other people in a shared warehouse (think semi-private TechShop), and the previous two options are keys, which get lost and is one more thing to keep track of, or a combo lock, where the three numbers can be shared with friends, and in the end there's no way to know who has access unless the combo gets changed, plus it's something to forget. Having a Bluetooth enabled lock allows us to grant, but more importantly revoke access over the Internet.
The lock itself does not need Internet access via WiFi.