This place is ideal for a single traveller (or maybe a couple) who is planning to spend most of the time out exploring the city. The patio area just around the door is very nice, but note that it is shared among several apartments. There are great cafes and restaurants throughout the neighbourhood, nearly all of which are very vegan-friendly. Three metro stops are also within 5-10 minutes walking distance.
As others have mentioned, there are a lot of stairs between the front door of the building to the apartment, and the stairs between the kitchen and bathroom/bedroom are VERY narrow (which is clearly noted in the description). I consider myself somewhat petite and I struggled - I relied heavily on the rails for balance. You get used to it after a while, though
Penelope was very easy to communicate with and responded quickly. I had a lot of questions and she was kind and prompt in answering all of them!