I stayed 6 weeks and was happy with the apartment, but it was not perfect. It was sometimes difficult to communicate with Clara and she was resistant to doing some normal things. All in all she took care of me and did everything that was required.
The apartment has no windows other then the door to the patio. The patio is fully enclosed other than the ceiling so no views or sun. Clothes need to be hung in the patio to dry and surprisingly (to me) they got dry just fine.
I liked the apartment and was happy there during my stay. The kitchen is good with all that is required as is the bathroom and living room. The neighborhood is great. No tourists and lots of good restaurants, food shopping, everything you need. Public transportation works great, normally one bus or metro to go wherever I wanted.
I bought a used bike which I sold back to the store at the end of my stay, https://monbikebarcelona.com/. That worked well for me. The apartment is uphill from the center of town. Many of my friends preferred the ebike subscription which allows you to pick up a bike and drop it off wherever you are. There are other cool options. If all you want is public transportation you will be happy with that, it works great.