I am using two one ton Gree on uper story and even these chill the room enough that I have to set temp at 28 at night to feel normal :p.
We installed two Haier LEK series 1.5 Ton in our office and right now its been 8 hours that its running on my head and still it cant bring temp down to 26C
working and working and whoever enter's the room asks if its running.
I spoke to the installer they dun know much but if you consider his opinion than he told me he found Gree better than all brands now a days even better than Mitsubhishi in terms of performance and people's satisfaction.
If you can afford buy their new Voila series.Voila Series (Heat & Cool) | DWP.
I am using Cool Art Cool Art | DWP