The apartment is exactly as shown in the pictures, it's newly renovated, clean, the kitchen is well equiped and fits well a couple.
The location is perfect! It's near everything you want to visit in Porto and near many good restaurants, shops, supermarkets, etc.
The host was there on time and was very friendly to us, leaving us a welcome Porto Wine and many tips on where to go and to eat.
The heating works but it would be a problem in a very cold winter, specialy if someone will sleep on the couch (we were there in february, temperarures were around 12°C).
The elevator didn't work the hole time we were there, it wasn't bad for us but maybe for someone who depends on it... Also, the parking in front of the apartment is not free during business days from 8am to 8pm.
To sum up, I would definetly recomend the apartment and would stay there next time im Porto!