Our stay at Mario's house was very comfortable and enjoyable! The place is great to spend a free time and to see the whole city. It's very close to the metro station, even so we walked everywhere by foot - to see main recognazable places. The apartement itself is clean, well maintained with a great sense of style and comfortable for guests. The big plus is a terrace, where you can eat breakfast for example and take a rest with a glass of wine after whole day of sigtseeing. Mario is very communicative and he's a great person and a very helpfull host! I fully recommend Mario's apartment for those who gonna stay in Porto. The city is beautiful! Cheers! :)