We did NOT have a good experience with U in Porto. On the check-in day the cleaning staff from U in Porto sent us a message at 2 pm (which is the regular check-in time) telling us they would clean the apartment at 2.30 pm. We had already checked-in early and U in Porto knew about this, so part of our stuff was already in the apartment (and the apartment was clean when we got there). We found out later that day that the cleaning staff took our stuff. Part of it we never got back, the other part we got back after 26 hours. During the 26 hours they couldn't tell us if our stuff was still somewhere and when we would get it back. U in Porto was very vague, slow and NOT transparant in their communication. It is also very annoying that they do not have a working phone number and that they are very anonymous (we only know the name of the company 'U in Porto'), this made the communication awkward. We had to make costs because of our missing stuff and asked for compensation (they never offered anything like that, we had to ask). However, they literally said this was all caused by us and until this day they are still not willing to compensate for the extra costs we had to make. Overall the stay was very stressful. I'm sure it is a pretty nice stay (location is great) if there does not happen anything unexpected, but if something does happen, you cannot count on their help and support. Don't go here if you'd like some service.