a very mixed feeling about this. the flat itself was nice and ideal for a group of five (although one room had a stained bed sheet). Great location too. however - a big issue was the app used to check in. Marco was quick on communication before the trip. However, check in and access was through a very silly app. what happened to normal keys? when we first arrived - at 3pm - the cleaner was just leaving. we then had serious issues with this app unlocking the flat, it was as if it hadn't set. we were therefore stuck for a couple of hours and couldn't get in...and the communication went quiet. finally someone came round with a key to open the door manually and then it started working. it then worked for the rest of the trip but it was such a disappointing start. we also hadn't been told which flat in the building it was, so had to guess and message to find out. the app was also unclear beforehand about passport requirements and how it worked generally