We were there during the Fetes de lumieres this past december and had a great time. The aparment is only 5 - 10 minutes away from the old city and also the train and bus station Perrache, so it's a great location to see the city.
The apartment itself is well equipped and big enough for two people. Solveign had everything ready and was always easily reachable by text. One thing that I had trouble with as a light sleeper was the noise (neighbors and fridge)... My girlfriend on the other hand slept like a baby.
I would recommend staying at this apartment :)