It's a cool airport, because it is a large multinational hub. Be sure to take coffee, it is the best in Ethiopia. The prices are biting. You can buy traditional souvenirs
In general, everything is not bad, but flights to Russia are often from a distant gate. Buses are often used, which creates tension during short transit connections (less than 1.5hours). Well, another disadvantage is that you have to go through transit control again, perhaps they don't trust Africans.
It's a good airport. Some places are very beautifully decorated. I liked the floor in one of the passages. I watched through the window as the movers warmed up.