Thank you Penélope & your lovely flatmates for making me feel so welcome :)
The flat is super convenient for the airport & sight-seeing as the metro is only a short walk away (5-10 mins). The room was huge, the bed was comfortable & surprisingly given the lively location it was quiet at night. Penélope provided some great tips - particularly the parks which are very close by.
I had a fabulous time in Berlin & would definitely recommend this place to friends.