We really liked Sergio's apartment, there's a nice amount of space, it feels very 'Barcelona' and great amenities.
Mei checked us in and made sure we knew where everything was.
Sergio checked we were ok and sent us recommendations for places to eat.
The location is great! We walked almost everywhere.
There are quite a few stairs which were fine, but not if you're not able/want to climb stairs and there is a main road outside which when the windows are open you can hear. I'm a light sleeper and this didn't trouble.
There's a cute bakery right outside - great for breakfast.
We thoroughly enjoyed staying here and Sergio and Mei made us feel very welcome and comfortable :)