Land services: excellent. All the drivers were very good and ready to cope with my requests. Cars were Ok, and all segments of the itinerary were correctly satisfied.
Hotels: very good. All the hotels in the itinerary, with one exception, provided good price-quality relationship. The hotels in the south of India were specially good, specifically the one at Tanjore. The only exception was the hotel at Konark, well below the other hotels, and clearly not up to the task. I am still waiting for the towels for my room, and we have to wait half an hour at 2300 in the night for the manager to show up. Incredible!
Anyway, very good hotels.
Flights: I have to suffer more delays than expected, in all 3,5 hours for 7 flights. This is of course no fault of Ecowin. They might have been warned me that this could happen, though. The trip covered all my objectives in spite of these delays, but one of them (2 hours in the flight from Delhi to Patna) could have impeded me of seeing Nalanda, which would have supposed a big flop for me.
Ecowin reacted well on the issue of the delayed flight between Gaya and Delhi (that would have made me loss the connecting flight to Bhubaneswar), but I would have thanked them to be more proactive in the issue: it was me to have to notice the change, phone them and suggest the solution.
One more issue: Ecowin did not provide me info about WL for Nalgiri toy train in spite of my continuous request. I had a confirmed booking in second class for Ooty-Coonor, and was in waiting list for the the whole trip (Met-Ooty). As a consequence, I wanted to know how the WL was evolving, to decide were to sleep (Ooty or Met, the other end of the line). No info was provided, though.
Anyway, i must say that their proposal for the toy train (Second class Ooty-Cooner with confirmed seat by the window) was better than a First Class from Mettupalayam in the center of the seat. So, my complain is on the lack of info, not on the trip.
It has been a wonderful trip, at a very reasonable price, and I am sure that if I come back to India, i will try to make my trip with them again.
Thanks to Ecowin, to Sameer and to the correspondents and drivers which made this possible.