Stayed with my husband for 4 days. Apartment had a well equipped kitchen, comfortable bed (could have used two more pillows), and was extremely clean. View from patio is lovely.
Walkable to both train stations in interlaken and all restaurants.
It must be mentioned that Interlaken was very hot when we visited and this unit does not have air conditioning . The host provided two good fans that allowed us to sleep at night. However, it was hard to be in the apartment during the day d/t the heat.
The only other complaint we had was the lack of window coverings. Not only would curtains have helped keep the heat down during the day, they also would have provided some privacy at night . Even just to change your clothes in this apartment at night with the lights on, you are on display for the town to see. It's a bit odd.