Pros:
This air cooler uses evaporation technology similar to ACs.
It is a cooling fan that provides cool air like an AC.
No need to add cold water/ice separately in this cooler.
Cooling is automatic. Just add normal water and it will blow cool air.
Water lasts a long time, no tension about refilling.
Cons:
Air cooler does not cool the room like an AC. It provides cool air as long as it is running (much like a fan).
Usage: Purchased 1.5 years ago. Not used much.
Completely fresh unit. No servicing required.