Roman's listing looks exactly like the picture. Charming with maximalist decor. It was brand new (stickers still on appliances new). If that's important to you, this is the place. In its newness, it may have been missing one or two kitchen needs, but nothing that couldn't be quickly rectified by the host (strainer, more dish towels). Everything worked. I had to take work calls while on vacation, and the WIFI was fast and reliable. The smart tv quickly connected to netflix.
As expected steps from the train, and convenient to a major roadway and ferry, there is noise with that convenience. The apartment rumbles a little bit when a train goes by, and if you're a light sleeper, you'll notice the delivery trucks in the morning, or the horn of the ferry as it slips into dock. While that was a little challenging for my sleep, I did not rent a car my entire trip, and didn't need one.
There are peeks of Lake Geneva from the balcony, and you're right on the waterfront promenade which goes directly both to Montreux(18min) and Chateau Chillon(25min). Pretty inside and out. I would recommend.