First of all, the Pros:
The communication for the reservation worked very well, fast and they concierge service was very polite. We stayed 3 nights.
The apartments looks very much like the photos.
It is very big, spatious and comfortable.
The WIFI works very well. The appliances and the kitchen all great. The bedrooms have everything you might need.
Now, the Cons:
*it's an apartment for 8 people, but they only have ONE key. Imagine coordinating when you go out or return.. it's a bit crazy and not pragmatic.
*During our stay, it was veeeery hot in Porto. Unfortunately, the apartment doesn't have any air conditioning or even Fans to share, so coming back from a hot day out and getting into the apartment was like going into Mordor :D
* Mold in the shower, lots of it. It's something easy to fix but it's a turn-off.
Overall, you get what you pay. If they invest a little bit more and put some love into it the Cons, this is a great spot to stay because of Pros :D
Cheers.