I would stay here again
The location of this hotel is wonderful. Since the Metro (the very useful and efficient subway system) is so important for travel in Paris, being close to a Metro station turns out to be a huge plus and the Hotel Langlois is less than 1 block from a Metro station -- the Trinité — d'Estienne d'Orves (a stop on the the dark green line 12). Since you may be lugging suitcases, this is wonderful.
The interior of the Langlois is very nice as well. Our room was on the ground floor. The room was quite small, as are many Paris hotel rooms in the moderate price range, but the very high ceilings, (maybe 14 feet high?) kept it from feeling claustrophobic. The room was clean. The furniture was pleasing. The roomy bathroom had old style fixtures including the ancient bathtub, but everything functioned perfectly and was spotless. The beds were comfortable. The owners keep this hotel in fine condition. Our window looked out onto a small but charming courtyard. Being on the first floor is a good idea. The "elevator" was an afterthought in this old hotel (installed within the existing swirl of staircase) and is likely the smallest one on the planet. And this is in a city with very small elevators.
Paris hotel-provided breakfasts are very convenient and "all you can eat" but they tend to be the same and are generally not a good value, perhaps 11 or 12 Euros each. The Hotel Langlois falls into this category. However, sometimes you want to just get up, get one of the free newspapers the hotel provides, and dive into some coffee and food. Eggs tend to be limited to soft-or-hard-boil-them-yourself, melons, cereals, pastries, sliced ham, and cheeses. It's not quite the omelets, two-over-light, hashbrowns, bacon and toast (and of course not grits) you may be used to, but it will get you started with no muss and no fuss.
The staff was exceptionally helpful and friendly.
Outside the hotel, you find yourself in a lively part of Paris. There are two or three cafes only steps away plus some good restaurants. Oddly enough, Paris is a city that turns in early at night. Restaurants, except for the outdoor cafes, seem to stop letting in customers around 10:00 p.m. The Metro stops running at 12:30 p.m., so you want to be sure to get home by about midnight. If you don't, you won't turn into a pumpkin, but you may end up walking a LONG way back to your hotel like we did twice by staying too late at the Eiffel Tower.
The thing is, Paris is 6 hours later than US time, so when you are ready for your 6:30 pm US dinner, everything except late night cafes have already been closed for 2.5 hours because it is 12:30 pm Paris time, so cafes are your dinner lifeline until you adjust (if you every do) to Paris time.
The Langlois was our favorite of the 3 hotels we stayed in during our visit to France. Oh, one last thing. You will love the remote control for the AC unit which is a small, but workable, device added high up on the wall long after this hotel was originally built. On the remote control, insead of a "high" setting, it says next to the button "Powerful." Cute.