I stayed here back in June 2008, so bear in mind some of this may have changed, but I'm sure it's relatively unchanged. The Hotel Langlois is a fantastic, affordable, classic Paris hotel.
The room we had, which was a two-room suite, was comfortable and large. It had high ceilings, a bathroom that was spacious and clean, and a television with cable. The view was very cool - it looked out onto the front street where every morning we could open the windows and see businessmen and women buzzing about on the streets. Our room was on the third floor, and there is a small elevator, which is unique and beautifully adorned in wood, but it is not necessary to use all the time. The marble stairs are large and on a gentle incline so unless you're on the top floor or unable to use stairs, it isn't a big problem.
The service was friendly - the front desk and breakfast staff were helpful and smiled when they saw us. There were free newspapers (The International Herald Tribune) at the desk every morning and breakfast was served in a front room. We ate there a few times but generally went to the corner and had a delicious breakfast at the cafe right there looking out at the plaza.
The location is excellent. It's in Paris's 9th district and therefore is convenient to many quintessential Parisian sites and places. There are many excellent restaurants nearby. Also, the hotel is in a location that is not too frequented by tourists, so you feel like a Parisian resident yourself when staying there.
The metro is nearby and taxis are plentiful in the area. There is a bike-sharing system at the foot of the street, viewable from the front rooms in the hotel.
Overall, it's a relatively affordable and hotel that is unique and filled with character and individuality. You will not find this anywhere else in Paris.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC