Marisa's apartment is right in the center of Bario Alto - the old town - and in a street with bars, cafes and restaurants, which give you a real sense of the city and all of it is on your doorstep. If you want a place to base yourself to explore this part of town and enjoy your evenings in bars and outdoor cafes/restaurants - it is ideal.
The apartment is compact and perfect for a city stay. I did not use the kitchen but it was clean - she has a cleaner, I met her twice during my stay - so she takes cleaning seriously.
It is a shared bathroom (toilet, wash basin and a large shower) - I had other people in the larger room when I stayed there but we never needed to use the bathroom at the same time so it was fine.
I had the single room, which for me was perfect- it was a business trip, I only came back to sleep. I met Marisa on my check out - she was going to remove the 2nd wardrobe from the room I used and add a desk, so I think this room will even better for future users.