We spent three nights in Ankober and were very satisfied. After horrible stay in Taitu hotel (which supposed to be the most famous in the area, the oldest etc.) Ankober was just a paradise! A bit cheaper and hundred times cleaner than the cleanest room in Taitu hotel!!!! Very friendly and helpful stuff, fluent in English. You can try to bargain, we were succesfull:) Rooms are rather small but furniture is very modern, nice hot shower, TV, parking. I think this guest house would even satisfied people who are expecting the "european standarts", which are rather unique in Ethiopia. This hotel doesn't have a view or shick garden and looks rather very basic from outside but what you get inside is really worth this money. View or bigger size of the room will mean nothing to you if are bitten by fleas all night like in many other hotels of this price level.
Nice location and feels very safe.