Definitely a great location to stay for going everywhere in Paris. Food and shopping areas are all in walking distance. Chatelet train station is just across from the building where major Metro/RER B to airport are aligned. Bus stop is a bit of walk. The building is easy to find with Foot Locker next door whether from the front entrance or back entrance. You can get some groceries at Monoprix also 5 mins walk in the Chatelet. Welcome toiletries was included (shampoo, conditioner, body wash, soap).
The walk to Musee Louvre is around 10 - 15 mins and there's sign to follow. Nicolas was great and responsive when we exchanged message. It was nice of him to also provide laundry detergent, so we could do laundry.
The cons are: The showerhead is definitely needed fixed. It kept falling off with no holder on the top. The house cleaner needs to clean a bit more as we still found some dust and stained in the kitchen and living room area. TV didn't work if you are looking to watch tv, but it didn't bother us since we were there for the foods, shopping and be out until evening time.
Please note that there'll be at least 5 steps stairs (2 parts) to lug your luggages although it stated 1st floor. It seems common in Europe as the ground floor mostly are stores. Nick was nice to help us with the luggages.
Overall, great location and decent apartment and price to stay. Will definitely stay there again when we come back.