We were there for 3 days on Feb 2009. It is a traditional guesthouse in a village 10km from Kastoria city. The village (Sidirohori), where the guesthouse is, has great great view to the lake of kastoria.
All rooms have fireplace, central heating and lcd tv. The owner is a very professional person and the staff very friendly and helpfull. The breakfast was very good and more than enough.
I would stay there again if want to be in Kastoria in the future... more