Eva's place is well located and close to some great restaurants (we loved Cafe Cook) and a reasonably priced bike rental shop. It's easy to get into the centre of Amsterdam by bike, tram, or bus and also simple to get to the airport by bus and train.
Eva was away when we visited and we were given the keys by one of her relatives, Manthos, who was kind enough to let us in when we arrived late in the evening after our flight. He was helpful with tourist information. There were other guests staying in another room in the apartment when we arrived.
The apartment was clean and there is a great, powerful shower in the bathroom. There is also a big table with plenty of dining chairs if you want to eat in the apartment, and a GameCube with three controllers, as some others have mentioned, for Mario Kart Double Dash fun!
Hand towels (but no bath towels) and a hairdryer were provided but there was no shampoo or body wash, fortunately my friends brought some so it was not a problem. There is WiFi.
The only real problem we had with the apartment was the large number of mosquitoes which seem to live in the bedroom - we were unprepared for them and it made sleeping uncomfortable. I suggest bringing some kind of insect repellent or a net if you are going to stay in the months when they may be active (we stayed in early October).