We are a U.S. family of four (me having lived abroad as a student years ago) taking a trip away from our temporary home in Finland. We stayed for 10 days in June. It's a very traditional Spanish house in a neighborhood a bit far away from the touristy areas of Barcelona. The patio is beautiful, spacious and sunny. The beds are small and a bit hard, so have an open mind.
We did a lot of walking and hiking and didn't have a car, so comfortable shoes were a must. The streets in the neighborhood are very, very steep and narrow; rustic and less modernised. Expect to see some crumbling buildings and graffiti as well as city smells, then all of a sudden beautiful parks bursting with flowers and greenery. There is wifi in the house, but as soon as you leave it goes away. For 15€ I bought a Simm card from Julia travels (main tour operator downtown) good for one month. Make sure you have your passport with you when you go to purchase it. Google maps and Uber saved us. Buses were slow and hot. Local restaurants were inexpensive and pretty good. The little bodega next door to the house has an ok variety of food compared to other stores in the area, but it very limited. We never found a big supermarket, but survived buying things from the local stores and bakeries to make our own meals. If you are picky about your linens, hairdryer, food items, personal products, etc, then bring your own from your home country. The house was very humid despite using the AC unit. In all it was a great trip. I was excited to get out of my comfort zone and return to Spain with my husband and children after living there as a student 30 years ago!