Our flat is a 10 minute walk from Barcelona Sants Station (main station) and a 7 minute walk from the 3 main metro lines, so it's very convenient to explore all of Barcelona. Everything you need is walking distance.
There is a kitchen (with a washer), dining room, and bathroom that you can use anytime. There is also WIFI. There is no air conditioning, but there is a fan and the flat has balconies so it stays cool in the summer.