We spent a week in Grindelwald in March spending time both skiing and traveling around the area sightseeing. Doris, the host, came to check on us when we arrived and she was very helpful and responsive. The rental is on the 3rd floor of a chalet. It was very clean and updated. The kitchen and living areas were both large and comfortable enough for us to spread out and enjoy ourselves. My two daughters shared the room with twin bunks and my son had a separate space with a single bed. The master bedroom was spacious with a comfortable king bed for my husband and myself. There is no washer/dryer but we used Chalet Aurelia who washed/dried and folded a load for only 20 francs.
The best part for us was the location. It is on a main road that leads from the Terminal train station to the downtown area of Grindelwald. We were able to walk easily with our luggage from the train station to the chalet. We were also able to easily walk to the Terminal train station and get on gondolas to head up the mountain. This was extremely helpful because the buses only ran until a little after 7:00pm so we were able to easily walk where we wanted to go even if the buses weren't running. This really made a difference when we wanted to do more sightseeing outside of Grindelwald. One night we took the last train to Grindelwald Terminal from Interlaken and then walked back to the chalet. There's also a bus stop just a few feet away from the house which we used frequently.
We would highly recommend!