Would stay again for sure. This is a good value in the heart of Barcelona.
The flat is on the 4th floor (5th floor if you're American and ground=1) and the stairs are very narrow. We have backpacks for luggage and that made it easy and the stairs weren't difficult, just narrow as you would expect in an old building.
We loved the location, drinks in the square, easy access to Rodalies at Estacio Franca and Metro at Jaume I and the energy of the area at night. It's not quiet, but the back bedrooms have a very quiet night so we weren't really bothered by street noise.
Naima's book of suggested local restaurants was really helpful. We had a great time enjoying the food within meters of our door.
We cooked breakfast on-site each day in the kitchen, so we can confirm that everything works well!