Location is excellent. Being so close to Paris St. Germain means you're in the center of Paris, a short walking distance to Notre Dame, Louvre Museum and other attractions
For the price, you get a good hotel accommodation, a clean room though you can tell some of the facilities are a bit outdated. Bed is big enough to sleep 2 adults. Bathroom is very clean; housekeeping cleans daily. You also get a good all you can eat complimentary breakfast which is fantastic. WiFi speed was excellent, average speed of 100Mbps from my room.
Receptionists are very helpful with tips on navigating around the city, finding good food and interacting with french locals who I couldn't communicate with in french. Overall, it was a good stay at the Louisianne, no complains. I wasn't expecting a five star experience considering the price and would have loved to have a TV in my room.
I will definitely come back on my next trip to Paris.