I have 2 table version (200 baht) and 1 room version (40L, 2000 baht).
I measured the table version which I use outside at my desk and indeed the outgoing air temperature is 5 degrees (C) lower the the surrounding temp.
When you point at a person it works ok but it will not cool the surroundings but better then only an air-fan.
The big one is used inside in a bedroom used as the day playground for the misses, she's happy with it. Big cooled airflow. It has containers which you can put in the freezer so that you can lay them in the water of the machine.
Happy with them.