I own a hitachi 2 T air conditioner ( It s TM model which means its twin motor one for the inner fan and another for the outer Fan ) Its since last two years in our house . I Got really nervous when I read reviews on hitachi 2 t Quadricool .
Till date I never needed a service to it and its functioning since the day it was installed . One thing I never went to a showroom for this AC but managed to get a service centre guy who also installs new air conditioners and got AC cheaper than the showroom price. It has been ruggedly used since its used in a large hall and sometimes the compressor working for 6 hours or even full 24 hours , although when this used to happen I used to change the temperature setting to one at which the compressor takes rest . I hope it would work without giving me any problems .
The samsung is lot cheaper than Hitachi and I am asking the sales people about using it in another hall .
Wish me best of luck