Marianne's apartment is wonderful. It's right in the middle of the old town. It's an easy walk to the nearest Metro stop but close enough to the centre to walk if you want to. We really enjoyed La Bonne Gache, a local bar and Le Bouchon des Filles at which we enjoyed an excellent three course meal for 30 euros each.
The appartment itself is lovely. Compact, contains everything you need and comfortable. I'd recommend this flat to anyone seeking a place to stay in Lyon.