O General is by far the leader in air conditioning. I bought a 2 ton air conditioner six months back and I am very satisfied with the product. The cooling is instant and excellent. The power consumption is limited as well and thus no fat electricity bills. Annual maintenance contract is free for first two years and even after two years renewal of contract is not too expensive.
The swings are powerful and will give you a good sleep. As compared to others, O General is slightly higher prices, on account of the quality it offers.
I am having a really good experience till date with this AC and recommend it to all.