This apartment was very clean and comfortable for our 5 day stay with four people. Remote check in was a breeze and the host was easy to communicate with throughout.
You’re three blocks from Sagrada Familia which is where you’ll take any underground metro. Keep in mind these are somewhat large blocks to walk if you plan on taking the metro often. There was no street or other outside noise to worry about which was great.
Our only small complaint was that the showers had slightly less pressure than preferred, but not a major issue at all. The cleanliness, high quality beds/pillows, good wifi, washer/dryer, etc made us plenty happy with our stay.
I would definitely stay here again the next time I visit Barcelona.