Communication was good and we were met outside the apartment early so we could drop our bags off (a huge help!). The apartment is a couple of minutes from Alexanderplatz and metro stations and the Tegel airport bus stops round the corner! The city tour buses stop outside Park Inn which is 5 mins walk away.
There are loads of lovely Vietnamese places in the street and a couple of nice bars near by. Try Volksbar for drinks and Madami for Vietnamese food.
The apartment is well equipped and very spacious. There was five of us staying but could've had more.
Overall a fab place to stay which I'd use again if I was in Berlin.
Thank you!