100% recommend staying at Ewa & Pau's place. Perfect size for a group of 3 and if you're down for a bit of leg workout on five flights of stays, absolute recommend staying. It's in an optimal location (food, shopping, sites, transportation, privacy) and comfortable setting (at home, vintage/beach theme interior, clean). A couple things were added bonus: fast wifi, hot water showers, and working ac.
Ewa was extremely responsive throughout the week we were there and very helpful from the beginning to the end of our booking.
If I visit Barcelona again would definitely want to book Ewa & Pau's place if it is available!