This review is dated April 2018.
We(self and mother) travelled with Kesari on a Domestic Group Tour to Mussorie, Nainital, Jim Corbett. Ours was the'Economy' version. Kesari also runs'Premium' tours on the same route.
Kesari managed everything brilliantly. It ran like a well-oiled machine.
While ours was economy, the hotels were 3-star or 3.5 star. Each hotel - Tulip Inn(Green and Breeze Resorts) in Mussorie, The Palace Belvedere in Nainital and the Serenity Resort in Corbett - were clean, food was great and hotel staff was polite.
Kesari tour guides were polite, friendly and had everything well in hand. I'd like to expressly call out their names - Abhishek Sansare, Ketan Bhosale and Chinmay(apologies, I don't know his last name) - were very helpful and we never felt any hesitation is asking them for any help.
We were a group of 47 spread across 3 buses. Inspite of the challenges inherent in managing such a large crowd, the 3 of them, led by Abhishek, did so effortlessly.
Prior to travel, we received detailed itenerary, names of fellow passengers, and were called by the tour guides at least twice prior to the travel date to make sure we knew travel times and we carrying necessary documentation etc.
Food in each hotel was buffet and was Indian food - breakfast was usually a few Indian items like Poha or upma,
Idli, paratha, cornflakes, toast and egg; lunch was usually along the lines of rice, dal, chapati, sabji, dessert and one non veg dish. Tasty food, never too oily or spicy and never resulted in tummy upset. I realize that the food was cooked by the hotel staff and not Kesari:), but I wanted to call out the thought that goes into selecting hotels and menu items.
The daily sightseeing schedule, though packed, isnt crazy. You get enough time to relax and unwind and simply chill out in your hotel in the morning/evening most days.
Start is usually at 8 or 9 am(depending on the number of sightseeing spots to be done and distances).
We had many families with kids or senior citizens and the pace of the tour was such that everyone was comfortable with it.
At Corbett, there was some difficulty in booking(something to do with changed rules to book safaris or some strike or something). The tour guides kept us appraised, without making a fuss but I could see the struggle and endless phone calls and co-ordination they did to get the safaris booked for us.
In a nutshell - Book your next trip with Kesari. It'll be money well-spent.

- Thank You! We appreciate your effort.