My friend and I had a pleasant stay at Guillaume's apartment. It is centrally located and has all the needed amenities for traveling. Getting there was very easy. We texted Guillaume from the train station, took a taxi, and was there within minutes.
Guillaume is very nice and responds quickly to texts. He made sure we understood everything about our surroundings and the apartment and also provided us with tourist information.
The apartment itself is spacious enough and clean. I would say that with the lofted bed, anyone who is tall may find it a bit awkward. I'm 5' 4", and it was fine for the time we stayed. It has a small kitchenette (which we didn't use too much), but it comes with all your possible needs. The bathroom is of ample size and clean.
The location of the apartment really is close to everything, but it is also by a couple of noisy bars, and after midnight, things would get pretty rowdy. I would say if you're a light-sleeper, you may need a location not-so-central.
My only complaint is that we never really got any hot water. The first day, we had a luke-warm shower. We alerted Guillaume, and I think he tried to get the problem fixed, but it was the weekend and I guess it was difficult to find a plumber. The second day, I got a warmer shower, but my friend got a cold shower. The third day, we both had cold showers. It was rainy in Lyon, so we were a little annoyed that we couldn't quite warm up. Maybe it was because his other two units in the building were also filled so there was a finite amount of hot water? Unfortunately the problem was not fixed before we left. As we understood from his texts, he never had this problem before, and we were the first to complain. But just because it never happened before, doesn't mean it never happens.
Anyhow, hot water aside, we had a nice stay. Definitely preferred to staying on this side of Lyon. I think Vieux Lyon would have been too busy for us.