The apartment was exactly as shown and very clean when we arrived. There are close to 100 stairs from street level to the front door of the apartment so not for those with physical challenges. There is a single-person TINY elevator that is useful only for getting your luggage up and down, not for daily ins and outs. The host took the time to walk us through the details of how to adjust the heating etc. Beds were very comfortable and the place was relatively quiet.
There are tons of restaurants, shops, bakeries etc nearby. Las Ramblas is easy walking distance. We tried taking taxis, bus, metro, or combinations thereof - for four adults taxis are cheapest as the bus and metro are over two euros each and you can’t transfer from one mode to the other without paying again. Buy tickets online in advance for tourist attractions like la Sagrada Familia or Parc Guell. You’ll skip the lines and prevent getting shut out.
Our favourite place to eat was Carrer de Blai - a street full of pinchos joints. Pinchos are essentially fancy canapés on skewers that sell for about 1 euro each, and four or five make a meal. We tried a couple, 9Blai was a bit more pricey but delicious. There is an awesome gelato place called Dinos on the same street for dessert. We also had a great dinner at Dona Rosa, terrific food and atmosphere.