Me and my family really enjoyed staying in this place. We were a group of five adults and found the space perfect for us. The chalet is beautiful, well furnished and very cozy. It has a lot of nice little details and is a very comfortable stay. It is not easily accessible without a car, but well worth the walk uphill if you don't have one.
The chalet is in really good condition with only minor things that could be improved. Hot water does not last very long, so if you choose to stay here it is a good idea to organise showering times (we needed to wait several hours for hot water after 3 of us showered one after the other), although I hear this is something common to most chalets. The beds and linen are not new by any means and could do with a renewal, but they were ok for us for the five days we were there.
Chateau d'Oex is a very quiet town (we were there right after New Year), but a lovely spot to relax, have some mountain walks and maybe go skiing to one of the nearby resorts (none of them are close though, you need a car or public transport to get there).
The woman that welcomed us (Valentina) was very kind and helpful at both the beginning and the end of the visit.
We only had one problem since at the end of our stay we were contacted by the manager about a lamp in the living room that was broken and she assumed we had done it. The lamp was broken when we got there, and there was an unpleasant message exchange explaining that it had not been us. It ended saying that the owner had been notified and we have not heard from her since (will update this review if I hear back). This was the only problem in an otherwise absolutely perfect vacation.