Value for money ! Fleet of brand new B-737-900. I had paid INR 2200 fron CCU-DAC, comperatively cheapest in this route, where other palyers are charging almost double. Only problem is schedule ! But I do prefer Air India Expree.
I paid INR 13,000 on IX flight from Kolkata to Singapore compared to about 21,000 in SQ. The aircraft was clean, the crew was reasonably friendly. They served snacks during the flight. I would say if they keep the aircraft clean and maintain time it's good value for money. I would have to fly few more times to see if Air India Express is reliable!