We had a great time. There were 5 of us and we had plenty of space. The flat looks even better than the pictures ! It's on the ground floor though, if seeing other people walk by your window might bother you there are blinds and curtains.
Lisa kept in touch with me and answered all of my questions. There's only a 2-3 minute walk to the U5, which connects to Alexander Platz and then everything else, this was perfect.
Thanks again for everything !