Claudia is an excellent host and the apartment is very comfortable and well located - it's a few minutes walk to the lake and the bus-stop to get to Montreux or Vevey. Claudia is very attentive, responsive and the Riviera Card that she provides helps you save on public transportation.
A couple of things to note are that if you drive, parking on the street is paid (10 CHF if you park for the whole day) although it is free on Sunday, and as mentioned in the listing, access from the street is not easy if you have a lot of luggage as you have to walk up a path with quite a few steps to get to the apartment. The other point is that the railway isn't that far away, and if you're a light sleeper, you may want to make sure that you have good earplugs.