This place was brilliant for our 4 days in Barcelona with 2 kids. On the doorstep of park Guell and a tiny 5 min walk to metro which basically connects to the majority of the big tourist sites.
Chemist, groceries and cafes all within 200 m.
Place was very clean. With comfy beds and great open plan kitchen dining area for end of day meals.
PS roof Terrace which would be amazing for sundowners with good city feel to it. PS not really for children as low ish walls.
Parking really close and as we tested fitted a car roof box as well.
Stairs and hill mentioned in previous posts are non issue. We had 2 yr and 4yr old with pram and managed perfectly.