Was lucky to get an upgrade to my reservation and we ended up staying on a big house instead of the apartment we booked. Khali was very friendly and helpful. The house is next to a train track, so if you are too sensitive to noise or vibration you might consider this. However we didn't find it bad at all. In fact I'm pretty sure we stop noticing after a while, and i don't think they run too late in the night because I did not have any problem sleeping.
The house is located on the north of the city, with easy access to the highway, and to the Olympiapark area, which made things simple for us. If you have a car you can just park it nearby for the day on a P+R and go with public transportation easily and quickly to the city center.