When people say the location of this flat is perfect, they are not wrong. It can't be possible to be closer to the Cathedral! So long as you are comfortable with narrow steep stairs, this is a great base for exploring Palma.
Communication beforehand with Tim, and check-in via Lili was smooth and easy.
At night, the area is extremely quiet, but unfortunately the building is abutting an enormous renovation project, meaning that construction noise starts at 6.30am and goes on until 6pm. Fine if you are out exploring, but not if you want a lie-in.
There is also a significant smell of drains in the bathroom, which can be remedied by opening the window onto the lightwell... but not while the construction dust is swirling outside (three of the lightwell's four walls open onto building sites).
In short: If you want to be on top of the sights in Palma and plan to be out all day, every day of your trip, then go for it.