We stayed at Cool House for a quick weekend in Porto. The location is absolutely great, walking distance from all main attractions. It is in a small quiet street so maybe your Uber driver won’t be able to drive you right under the apartment but just a street away and it is really perfectly walkable. The apartment is small and nice, perfect for a quick weekend. The only small downside was that we arrived quite late at night (around 1am, very easy self check in btw) and the apartment was freezing. We were there in February so during the day it was sunny and nice but in the night a bit chilly. It is not perfectly clear that the ac actually works as heating and the first night we were really cold in the apartment. There is a wooden grate hiding the ac and I think it retains a lot of the heat, the apartment never really got warm, maybe that’s why it’s called cool house ;) for sleeping we were cold just the first night, after that we found an extra cover under the bed and it was fine