The apartment is a tastefully furnished & well-designed studio located in a fantastic Central location in the heart of Porto, surrounded by stores, bars, and restaurants. It has a comfortable (but very firm) bed, comfy couches, a dining table, very effective Aircon, full kitchen, spacious & high-quality bathroom, and a decent TV with Netflix. The self check-in instructions were very thorough with clear photos of everything, making it a seamless experience to arrive & leave... however be aware that the apartment is not entirely 'Quiet'.
As with most Porto apartments, the thin walls unfortunately mean you can hear everything in the hallways very clearly and people moving around next-door & upstairs, however most noise comes from the patio. Just be prepared for the call of seagulls at all hours of day/night and the hourly bells from a nearby church (from around 7am or 8am onwards).
Overall the apartment is still great value for the quality and location, however if you're not a very heavy sleeper - I would recommend bringing some earplugs for your stay.