Our main reason for choosing this hostel was its location. Hostal Opapa is really close to the bus station, just a 400 metres walk. The service is excellent, provided in Spanish/English and to our surprise also in German. The breakfast included home made wholegrain bread(only places from our hostels in Chile) and dessert according to the season. Inside the hostel there are personal pictures, puzzles, things etc. attached to the walls. We liked this stuff, it told the story of the house to us.
In our opinion, room was definitely warm enough. Actually we didn't even use all the wool blankets from the room.
The view from the room was stunning, headed to the volcano Calbuco. Highly recommended to stay here, if you like staying uphill from the lake.