This apartment was 100% perfect. I absolutely loved the space and the amenities provided. Do note that this apartment is a 4 floor walk up. But the apartment is quite worth it. The bedroom was very comfortable (so comfortable it made it harder to get out of bed to go sightseeing!). The kitchen is my dream kitchen. Has all the basic things you need to make a quick meal but trust me you won't need to because the amount of amazing food places near by are immense. My favorite was Palo Cortao which is just down the street. Bathroom and shower are relatively small but fulfilled the needs of a couple on vacation and was very clean. Living room is very spacious and comfortable to lay out like a dog after a long day of walking and sightseeing.
Also! The Host!! He was super informative and accommodating. He was available for questions and even recommendations for whenever we were in a specific neighborhood and needed advice.
The air conditioning is very strong.
Wifi connection was fantastic, no issues whatsoever.
The neighborhood was awesome. Very safe even in late night hours. I actually liked that this neighborhood isn't very touristy and has mix of locals and tourists, so it felt a bit more of an authentic Barcelona experience. Lots of great places to eat and the metro and buses are very close by.