We loved Susanna's apartment! The patio was very important to us in booking, and did not disappoint as a wonderful oasis between outings. Having a kitchen was also important to us, and although it is very tiny, it was great to have, and enabled us to cook a couple of dinners from ingredients purchased at the nearby market. One of our only complaints was that the dishes in the cabinets were not very clean, so we got in the habit of washing everything before we used it.
The space is super cute, patio is private and delightful, bed is comfortable, and everything worked. We walked everywhere (60 miles over 8 days, says my Fitbit), and the location, though not smack dab in the middle of the most tourist-y areas, was very convenient. There are quite a few wonderful bars and restaurants within just a few blocks, and we loved being near Sant Antoni market.
Location was pretty quiet -- not a lot of people noise -- but there was a lot of construction happening nearby (including in the foyer of the building!), which got started early in the morning and was audible in the apartment.
Toiletries and consumables appear to just be whatever has been left by previous guests; there were bottles of body wash and conditioner in the shower, but no shampoo. We bought (and left) shampoo, paper towels, laundry detergent, coffee, and maybe more during our stay. This seemed reasonable for the length of our stay, but we were glad we did an inventory soon after arrival so we could immediately get what we needed.
We locked ourselves out of the apartment one afternoon and the caretaker's daughter was able to save us a few hours later (so glad we realized it on our way out, and at a reasonable time!).
Check-in was fine, but Luda, the caretaker, does need to know pretty specifically when you'll be arriving. It took us longer to get from the airport than Susanna estimated, so Luda was kept waiting, which seemed inconvenient for her. (It took almost 2 hours from when our plane landed, taking the A1 bus; we didn't check any luggage.)
Overall, we loved our time at Susanna's apartment and wouldn't hesitate to book again or recommend it to friends.