Flat was clean and well furnished with a comfy bed and a kitchen stocked with some provisions from the Lidl across the street.
Access to the flat was via a combination key locker. Sam sent the combination on the morning of my arrival.
Didn't have any issues with the traffic noise, but I can appreciate that more sound-sensitive guests may have an issue. The studio does build up heat during the day as it's at the top of the building. One would just need to open up the window to let out the excess heat and use the fan accordingly.
Walking distance to the European Parliament (about 10 minutes).
Only issue was that the internet access wasn't consistent. WiFi stayed connected, but internet connection would drop. Wasn't an issue as I could switch to my mobile data, but may be frustating if you're relying on it for work.
Both Sam and The Guardian had recommended Kif Kif, a Moroccan restaurant. It was an excellent suggestion.