I fly almost 6 times a year since last few years. I have flown all the airlines that are available in India as of now. And among them, Indigo is still the best. I mean, while the service has gone down at both level (airport & office), it still offers timely services. And it has connections to almost every part of India.
They have also lately introduced the prime service while booking tickets directly from them which is a great combo offer for seats, fast check in and food on board. All in all its the only airline in low cost sector that gives you value for money. And I have also seen that its ticket rates are very affordable until at least 15 days from date of travel.
However there are also many scope of improvements. First and foremost the training of the staff should be done properly, the new and upcoming staff surely lacks the ethics of previous generation. And they need to introduce more type of food on board like SpiceJet which I only like due to its food on board :)
I will give Indigo a four star and hope to edit this review in future if their service improves.