We had a fantastic time staying at the greenhouse; Jovitas hospitality (including a welcome gift!) was amazing and much appreciated- the flat is immaculate and comfortable with everything you need for a stay in Porto including maps and guides. Jovita recommended some places to eat which turned out to be excellent and gave us a good mini-orientation of the area. The location of the flat is ideal to get to see everything worth seeing and is easy to get to by metro from the airport. I would highly recommend both Porto and the Greenhouse to anyone planning a trip- amazing!
PS The only thing to note is if you have mobility issues its on the 3rd floor so you may struggle with the stairs.