I am using aircel from past 3 to 4 years. I have read many reviews regarding aircel and most of them were negative reviews. But in my case I am quite satisfied with it. Yes it sometimes struggles with the network in remotes areas but here in mumbai it works perfectly fine. Best part is that it is cheaper than any other mobile operator. It’s sms pack, calls and internet packs costs way less than others. The limitation which I can point out is that its internet speed lags behind than others as it is cheaper but its not too slow and morever it’s not a major issue for me as I use wifi.