I bought Voltas 1.5 ton window AC for my house 1 year back and im very happy eith its super quality air conditioning feature.
It makes the room very cold quickly and that time you feel that yes I have purchased a good product.
If we talk about its service then I would say that they are very supportive and they help you in a very short time so you dont have to call them again and again for your issues.
All the credits goes to Tata for their super quality product and services.