Our group consisted of two couples and we had very nice 6-night stay at this place, which is actually a townhouse. Please be aware that the place has bedrooms on the second floor and the stairs are quite steep. Also, the fridge is rather small and if you need a laundry, make sure you ask host to give you some directions or advice. There's a ferry service five minutes away, opened from 10 till 5 daily. Overall, public transportation to Porto and in the city is very good. If you want to drive your car, the best way is to use the riverside road and park you car in the public garage 3 km away, next to the cable car station and cross the river via Luis 1st bridge by foot right in the middle of the historical Ribeira district.
You're not going to be dissapointed!