Maria's place is a good stop for a quick night in Porto. The space is compact, but nice and Maria is a good host. She provided some welcome snacks (custard tarts) and port wine. Note that it is located above a bar so the street noise is quite loud, but a pair of earplugs will do just fine! One safety note - the door requires a key to get OUT so a) it is easy to lock yourself IN and b) would be unsafe in the event of a fire. Also, it is not a flexible checkin if you do not know your plans or times - you must make prior arrangements and stick to that time.