I will definitely be back! The pictures do not lie, the view really is that amazing.
Frank is an excellent host, he really cares about providing his guests with a comfortable, clean, and enjoyable stay. No language barriers for us as Americans. He can give you excellent recommendations for things to do that are off-the-beaten-path. The bed was comfy and soft, the shower was fabulous (amazing water pressure), the kitchen has everything you need to cook a meal. The patio is fabulous and quiet. There are 2 adorable sheep for neighbors that we really enjoyed watching play while we sat out on the patio. Don't worry, they are not loud at all.
There is a large parking space if you travel by car. There is a bus stop about a 2 minute walk away that will take you down to the city center quickly, by which you can get anywhere else. There is also a nice small grocery store that is about a 1 minute walk away, very convenient.
When you stay here, there is a regional Thunersee pass that you are given when you pay the tourist tax (we stayed 5 nights, and it was 24 CHF for the both of us) - this gives you free travel through the area on public transport, as well as discounts on things like nearby cable cars, museums, attractions, and discounts at some shops/restaurants. We were able to put this to good use - we saved more than the 24 chf we paid for it.
Absolutely stay here, it is spotless clean, modern, safe, quiet, and incredibly comfortable.