First of all - great welcome from Peter, very well prepared with all the most important tips you can get! Second - great location, close to Westbahnof and the stores it contains, close to city center by walk, U-bahn... Then, everything was very clean and neat. And quiet - the appartment is oriented towards the yard. The only small remark we have towards the appartment is lacking bathroom door (there is a curtain, however) which might be an issue if you are travelling with someone not very close to you. We were there as a family, so it was not a problem for us, but we noticed.
Other than that - everything was great and we would definitely come again!