I have been using this great machine for two years now and results have been great.
The room is 12* 15 and is on top floor and thus act likes an furnace in afternoon. Still this machine manages to cool things off in 15 minutes in day and 5 mins in night.
The operation is quiet and power consumption is descent for a 3 star.
It comes with a power chill mode which lets u chill the room on high temperature days.
In price u can compare it with a o general window AC and I can assure it is comparable in cooling with that too.