First time Airbnb, and we had a great stay.
We were welcomed by Ana, who made us immediately feel at ease. She had a welcome surprise for us (a little bottle of Porto and the most delicious Pastéis de Nata in town), which was highly appreciated.
Ana is a very kind person, helpful, and flexible. She arranged a taxi from the airport, and she was very flexible for the checkout time (we had to leave early).

It's a large, great, modern apartment, and it's kept very clean.
Everything you need is provided, from wifi, towels, a bottle of water, to some coffee and thee.
The two bedrooms have large wardrobes and comfortable beds.
The shower is large, and there is a kitchen with everything you need to cook if you want to.
The apartment is very near the center (less than a 10-minute walk), and only a few minutes from many pubs.
Ana provides you with the best places to have breakfast and lunch/dinner, all very nearby.

The 4th floor location was quickly forgotten because we got a great view over the city and could see up to the castle.
What a great apartment and a fantastic host!
Highly recommended!