Staying at Studio Masséna was the right choice for our Lyon trip! The studio is lovely and charming (exactly as presented on the photos) and a great place to relax before and after exploring the city. Every morning we treated ourselves with divine pastry from the bakery just outside the house and tried a few fabulous restaurants in the rue Masséna - which, by the way, links the fantastic city park "Parque de la Tête d'or" (one of France's biggest urban parks!) and Lyon's biggest Shopping Centre. Starting from Studio Masséna it's only a short walk either way.
The next métro station and supermarket are also only a few minutes' walk away - you've really got everything you need just around the corner!
If you are not happy with climbing staircases: consider that the studio is on the third floor (no elevator).
I wouldn't recommend the place to very tall people - the ceilings of the sleeping gallery upstairs and of the bathroom are not very high.
But for me and my friend everything was perfect, thank you Sophie & Stéphane!