Its been 1 yr now since I am using this AC(1.5 Ton SG18FLT). As of now I have not used any kind of service from Onida, so cannot comment on that. As far as the question of cooling and sound is concern, its great..can chill within mnts. I live in North India and in June temp. crossed over 40 deree celcius mark.
After traveling of almost 2hrs in train from my office to home, I become all in but as soon as I start the AC, I start feeling as fresh as I was in morning. LG and Samsung are not too good and Voltas/Carrier are too dear, it is the best within this price range.Its MRP is 23, 990/- but from a known sourced a got it for Rs.20500/-.
If someone is thinking for a gud deal within 20, 000/- rage, this product will not let you down and will only make you smile. I will definately recomend.