Location and the balcony are fantastic. The apartment is walking distance to everything in El Borne and The Gothic Quarter, along with lots of great cafes and tapa spots. We loved having coffee on the balcony in the mornings and wine in the evenings. Very spacious, we were just two people staying there, but it would be plenty of space for two couples.
There were a few things about the apartment that left something to be desired though, mainly the amenities. The host provided a box with fancy chocolates and olive oil, however we would have rather have had practical items like filters for the coffee maker or more laundry soap. We needed to buy large boxes of these things at the store even though we only needed a few.
The showers were somewhat difficult to use, one being very cramped and the other being impossible to use without getting water all over the bathroom. We also found the beds to be uncomfortable, but this may be personal taste (they were extremely firm).