Some of the routes offered are now being quoted at pretty competitive prices, such as the Mumbai-Delhi route at INR 16,000 which is usually what other airlines sell their full-service business class products at on this route.
However, while I did try and locate the fares on some sectors, I did not have success in finding an INR 15.8K for two paxs flying business class on various dates all the way till November 2015. The least I could find was INR 18,000. Since the T&C were not mentioned anywhere on the website, I was not able to corroborate the T&C with the actual dates I was trying to price with.
If you have success with this fare, do let me know and I’d personally love to book some fares with Vistara on this promotion since I am still to fly their business class section.