hi, we use ihost, it's a solution from a new company that includes a hub, a smart lock and a smart doorbell that does 2 way communication with guests. All this managed by them. They open the doors for our guests and interact with them.
It's saved us time as we are based in Dubai and have a property in London.
They also do the traditional airbnb concierge tasks like linen and cleaning.
We've had positive reviews and can host guests even if they arrive really early or really late.
let me know if someone wants more info [personal information hidden for safety reasons]