Of all the Air BnBs we stayed at during our recent 3 week trip around Spain and Portugal, this space was by far the nicest. The apartment was clean, uncluttered, modern, and comfortable. Though it is a small space it did not feel cramped or uncomfortable. I think this would be a perfect place to stay on a trip to Porto....except in the summer. We visited in June. While we were there the weather was extremely hot, and with no air conditioning this meant open windows. Because the apartment is in a main square and above a bus stop, this unfortunately meant a TON of noise until about 4 AM (even during the week), fumes and cigarette smoke coming into the apartment, and even bugs. So many bugs. However, with the windows closed it was lovely-- just too hot. So I think any time from September-May this would be a perfect place! The hosts are extremely kind and it is very central to everything. There are even a few lovely coffee and pastry shops right downstairs for early morning caffeine needs! :)