First time when I traveled in a flight it was indigo, I was sitting on the window seat enjoying the view outside, clouds were looking like mountains covered with snow!. I have traveled in indigo, spice-jet and go air, but I always prefer to travel via indigo as, their service is the best. The seating arrangement is done in a way that it makes the flight look more stylish from inside, and the seats are also very comfortable. I think they come to sell food and cold-drinks only in indigo airlines. I would suggest you to go with indigo as they provide best facilities at a cheap price.