OVERALL: historic hotel right in the city centre and walking distance from key spots auch as Victoria Memorial or Park Street.
Spacious rooms, out of date bathrooms, subpar amenities, great spa...
It has elements of an unpolished gem, but needs some better care for details:

Below the good and not so good:

Lacking points:

- bathroom, out of date (curtain, no shower head...), amenities are not up to scratch (razors, tooth brush etc, all just average like in any cheap hotel; old hairdryer...)
- Forest Essentials shampoo are nice though
- in room amenities (tea etc, very low quality; no sparkling water etc, it was like looking at a cheap supermarket shelf; cheap tea, coffee, drinks etc...)
- bottled water has a quite strong staid water flavour
- sound insulation is quite bad from the door/hallway

All that was overshadowed by the good parts
- amazing people, service,
- restaurants were good for lunch and breakfast
- a worldbeating spa
- dummy equipped great gym...
- and the location in the very city centre you can walk to Victoria Memorial, Indian Museum etc

It is an old hotel but has been renovated nicely throughout the hotel. We stayed in premier room for 5 nights . Large bedroom but the bath room is very small. The room serves was excellent. The staff were very helpful and made our stay very comfortable.
We have few little issues in the room but they were put right straight away.

I wasn’t very impressed with the service in the dining room. Few times we were take to a table which was dirty and we were told sit while they were cleaning.
They shouldn’t have take us to the table before cleaning. We were happy to wait for them to clean the table before we were taken to the table. After ordering cooked breakfast there is long waiting some days we were waiting for the menu for over 5 minutes. You will have to wait for tea another 5 times. We had to wait for everything.

There are plenty of staff in the dining room but I think they need more training.
All the staff including the door men were very helpful.
Thank you everyone for making our stay comfortable.

We stayed at Oberoi Grand Kolkata during late November 2023. Regardless that our reservation was made 4 months in advance for a premier room with balcony, just two days before arriving, we were informed that it would not be available but after exchanging emails we were then re-confirmed. However, upon arrival we were given a wrong room(luxury) with a balcony and finally we were changed to a premier room but without a balcony, a total disaster caused by the reservations department. It should be mentioned that near the second room assigned #464 there was construction work with hammering that stopped after our complaint. The hotel is beautiful and elegant but it is immersed in the middle of chaos that is perceived not only immediately when crossing the door but also from inside because political demonstrations are being held in front with the use of loud speakers. In short, we could not achieve the experience and tranquility that is expected in a property like this.We ate every time at the hotel and the quality of the food in both the restaurant and room service was excellent. The a la carte menu at the 363 restaurant was limited and several wines were not available.There was a wedding during our stay where the attendees were from a big group mostly from the USA and sometimes it was difficult to find a good table at breakfast or a lounge chair at the pool.
I recognize that the staff made every effort to please us and that is appreciated, however we would not return.