I bought hitachi ac for ma 12* 12 size bedroom.It cost me around 40K.It is non inverter and 3 star ac, I purchsed it just 1 month ago so can not comment about electricity usage right now.Performance of this ac is superb.Neagative point of the ac is that it looks very dull and very badly designed.More then that there is just 1 flap for airflow which looks bad and also very incovinient for good air flow.Apart from that it cools my room in just 15 minutes.Remote is good but some inputs are not userfriendly.For an example they have symbols for different modes like cool dry so sometimes it is very confusing.Satisfied with their customer service.They came for ac fitting just next day after purchasing.It makes very less noise so does not affect my sleep.Overall it is good product with good value of money but I hope hitachi will improve design for their upcoming models.