My wife and I stayed at the apartment for the month of January to scout out Lyon as a potential city to live in. I would say that this apartment is good for shorter trips and maybe not as good for long term stays.
We had poor communication upon arrival. No response to messages leading up to the arrival and we had to call several times upon landing at the airport. Luckily, we got him and didn't need stay in a hotel. There was no heat on before we arrived so the first night was very cold, but they have two electric heaters that work well.
The apartment is as shown in pictures. The bed is firm.
Location is great for getting around Lyon. Same street as the University. Short walking distance to the train station. The old town is maybe a twenty minute walk and no more than 35-40 minute walk from any restaurant/bar you would want to go to. We walked from the Fourvière church to the apartment in under an hour (keep in mind the hill is very steep). Bakeries, grocery stores, etc. all close by. This area is a bit of a multicultural area; Pho, Tapenyaki, Bahn Mi, and an excess of Tandoori restaurants. Any Lyonaise Buchon will be a twenty minute walk or more.
The main issue with the apartment is noise. There is a busy little college bar a half a block from the apartment. People generally spill onto the street making noise every night except Sunday's when they're closed. Thin walls mean you can often hear the neighbours. Also, one thing to note, the bathroom (specifically the toilet room) is a bit of an echo chamber. It's on the stairs side with a small window that opens to the building's main staircase. Any time an individual goes to the washroom it is amplified in the apartment. I could see how that would be awkward for new couples (we played music to cover it up).