We had a great time staying at "la tranquille". Monika was a great hostess; she waited us with little welcome presents and made us feel at home right away. She is also a very warm person, always smiling and ready to help you if you are in need of anything. We could speak with her in English or French which was pretty cool.
The view from the house is magnificent, if there is not much myst, you can see the lake and the mountains in an incredible way.
In conclusion, we were really comfortable at Monika's, we had a great time and if we ever come back to Montreux we will stay at "la tranquille" for sure.