We stayed in the Hostal Dientes del Navarino, which belongs to Hostal Forjadores for two nights after doing the Dientes trek.
The stuff was very nice and helpful. The rooms and beds are nice but basic. There are some sofas in the shared room.
The internet connection is as good as you can expect on an island in the middle of nowhere.
The breakfast is very simple (bread, jam and butter) but you can eat as much as it is available. When you wake up too late, you will get less.
All in all the accomodation is simple and basic but good for the price.