Like all other guests, we very much enjoyed our stay high atop Vieux Lyon at Laure's place. What can we add to others' reviews? First of all, showering in the morning with a view to the east with the sun rising over Lyon is a great way to start one's morning. (Of course, as others have mentioned, the views from the apartment and the terrace during the rest of the day and at night are amazing.) The other is that the apartment is tastefully decorated and nestled in garden surroundings; it's nice to spend time in beautiful spaces, even if Lyon is beckoning.
It's worth emphasizing that the stairs are indeed challenging. We are in our mid-60's and handled them well but a tumble could be disastrous; if you are planning on enjoying Lyon's nightlife to excess, consider staying elsewhere. Also, plan on not taking normal luggage up the steps; repack what you'll need in backpacks / bags.