I review it after 6 month of use Cooling factor : considering my room size which is more than 10 x 11 ft, plus a kitchen and a corridor, the ac cools fast. I don't use the Himalaya cooling, but just set the thermoset to 27-26 c which efficiently cools.Maintenance. till now I regularly clean the air filter as per the user manual. and I can say all is good. the time taken to cool the room is little high, might be my room is little large. But I sleep right below the AC, so I get cool air immediately. Overall the AC is serving the purpose just ok .