I don't know what it takes to be a "superhost" on Airbnb, but Sandrine and Marcel are most definitely superhosts. We had the most incredible time at their home. They went above and beyond for us and made us feel so comfortable. It felt like we were staying with our Aunt and Uncle. The house was beautiful and cozy and in a breathtaking location. I would absolutely recommend staying here. I cannot rave about their hospitality and the quality of our experience enough!
The only thing to consider is that day trips are made easier by having a car. We relied on the train which stops very close to the house, but it does not run late at night because it only operates commuter hours. We got around just fine, but be aware that the last train up the mountain leaves the nearest town (Vevey) at 6:48 pm. They do have Uber in this area though, so you can take a late train to Vevey and Uber up the rest of the way if you are getting back late.