Great cost-benefit. The location is pretty much unbeatable: you're meters away from Torre do Clérigo, one of the main landmarks of the city. The block is very alive at night full of restaurants and bars. You're also at walking distance of the baixada.
The apartment itself is quite small in a dated building, but it's very well organized. The beds are great and the bathroom is quite large. The only downside is the shower which is a bit complex to use as it's too low to get under it so you end up using it in handheld mode - but I understand, given the apartment proportions, it's the best solution anyway.
The host is also very friendly and gave us a massive list of valuable tips and places to visit and eat. That alone is priceless.