I had bought Voltas Vertis Gold 1.5 ton window AC from Pankaj electronics 1 Yr back, Delhi. It costed me 20, 000/- with installation + bluebird wall mounted stabilizer. Since, I had to install on a room 13x12 top floor NE facing. I needed something which would work in delhi hot summer. So I zero down to Voltas AC. According to my budjet I could get Voltas Vertis Gold only.
I had doubt about cooling in hot summer. But last summer it worked well and cooling was good. Since it start of summer in delhi now. I have full faith in this machine.
Service, it nice . Twice I called called for service . they came on time without any reminder. The guy also cleaned the filter, washed the part of filter. cleaned internally. Check the wiring and cooling. Placed it back nicely. Only the call centre hard to get during weekend. Call them very early morning in order to avoid waiting time.
Remote is also nice and strong. working fine now.
One thing which I feel it is an issue is loud sound when Compressor Stop/Start. To avoid this go for split AC.
Few factor which one should keep in mind
Budget
Room Site.
Duration of direct sun light coming into room.
Facing of the window where it need to installed.
Near to power socket. Wiring.
Meter MDI Load.
Size of window where to be placed, etc .
Note : This is not a legal/professional advise, it just a personal opinion. Use information at your own risk.