Perfect place in the perfect location. The flat is exactly as it is described, only better. Our family met in Lyon for Christmas, and everyone was within a few blocks of each other. Ours by far had the most living space and the largest bedroom, as well as incredible views onto the street. The kitchen and bathroom are small, but well stocked with everything we needed and more. I will note that the shower was a tight fit for my 6'7" fiancé (many showers are!), but it was no problem for me and there was ample hot water. The bed was incredibly comfortable, and we opted to lay around in it when the weather was not in our favor.
When we arrived Marie met us within minutes (like, 2) and told us everything we needed to know. They also left us a praline tart and chocolates. There are plenty of guidebooks and information about Lyon in the flat, so you don't need to bring anything. Great restaurants, the ruins, markets, and shopping are all close by; you can cross the river and be in the main square within 10 minutes.
Also: Jacques and Marie are very prompt communicators, which was really helpful. They stayed in contact from the time we booked and through our departure to see if there was anything we needed, and made sure we knew how to find the place easily. We couldn't have asked for a better experience.