I have been using it for the past 1 year.
Installation was done free of charge by Voltas as a part of some scheme.
The indoor unit is calm and provides very good cooling. You can also turn off the led display on the indoor unit to avoid any distraction at night.
The remote is good and also offers backlit led display.
The copper coils for installation were long enough and served for the installtion perfectly while some coil length was still saved.
Its good on running economics.
I also have another voltas 5 star AC.
The overall electricity bills have never been a pain.