We once again opted for staying at this hoyel based solely on the comments on Tripadviser, which as usual, were "spot on"! Whilst the hotel is small, and the rooms likewise, it is spotlessly clean, the staff at reception excellent and helpful [we need more Aurelie's at other hotels] and it is very centrally located.
On arrival, our room was not yet ready but as we had a lunch we needed to get to, Aurelie put us in a room set aside for special purposes just so we could freshen up and change - and delivered tea as well! When we eventually got back to the hotel, we found our room rather tight for space so Aurelie offered us another room which had a small extra alcove which made all the difference [Room 104]! Whilst the buffet breakfast was not extensive, it was adequate altho the cost may be a little expensive for what was available! But it is convenient!
If we return to Paris at any time, I would not hesitate in booking again at Hotel Gramont Opera - it's satisfying to find these little gems and when we do, they go in the "book" for future use and referral!

This hotel is in a great location and as we were only in Paris for four nights it gave us ample opportunity to explore without having to travel too far. The staff were all very welcoming and happy to provide us with plug adaptors (which we forgot), maps and directions.

The buffet style breakfast offered wasn't very good value for money compared to other places in the area, but it was nice food and much more convenient.

We stayed in room 402 - which sleeps four people, and were extremely pleased at having two bathrooms - this saved a lot of time in the morning!

Free WiFi was also a very big plus!

We stayed 6 nights, and were very happy with our stay. The staff is excellent. Benoit went out of his way to help us, along with Aurelie, with restaurant suggestions and additional travel plans for day trips out of the city. The room was a little tight for 3 beds, but that was expected. The beds were very comfortable. The location is very good, with easy access to the Metro, Galleries Lafayette, and not too bad of a walk to the Louvre.

I have booked this hotel based on the large number of great reviews.
My fault, I didn't noticed it is a 3 stars hotel, but anyway the reviews do not reflect the true.
The hotel has a nice location, close to the Opera and the Galeries Lafayette.
The staff is courteous, but that doesn't mean professional.
I have arrived with my husband on October 20th and it was clear the receptionist (with no uniform - no one wears uniform) couldn't find our reservation. I asked if she wanted the confirmation number and she said it was not necessary, but as she kept looking her papers over and over I gave her the reservation voucher (booked with Agoda, paid in full) she asked me: "Have you checked in yesterday?" I was with THREE large suitcases, is it usual to walk around Paris with three suitcases and check in again and again? I answered NO and asked, can't you find my room? and she answered the obvious: My room has been given to some other guest! At first I didn't even know how much I would get back for the new room, and, her words "I swear It's gonna be around €100.00 a night" which obviously was not. "Swear" is not a very professional verb. There is never a manager on duty, if there's a problem, good luck...
She assumed a subservient role, apologizing all the time. To make it short I was given a way smaller room (505) with an unbelievable inclined floor (3% - checked on my iPhone - 4% is the maximum for a wheelchair user!), a "Kinder Egg" style bathroom with no space at all.
We were refunded €40.00 a night and received free breakfast as a compensation.
We also got a free bottle of Champagne with an ice bucket. We left the hotel around 10:00 AM to stroll around, so I hung the "Please make up the room" sign on the door knob. We had to jump over some bags with dirty towels that the staff left right by my room door along with the vacuum to leave the room. On our return at night the ice bucket was there with water inside to remind us of their generosity...
I would never stay here again.