Four friends and I chose to stay in this apartment because it seemed to be in a fairly central location and was good value for the number of rooms - it fitted 5 comfortably but in the heat a sixth person (to share the double bed) may not have been as comfortable. The pictures made it a very attractive option and we were pleased to find that it was as pretty in real life as it looks online.
The apartment was clean, fairly well lit and comfortable for the 3/4 days that we stayed. The kitchen was functional enough (although we had trouble finding tea towels or oven gloves when we needed them because the frying pans had no handles) however the oven didn't seem to heat up when we tried so I would recommend checking that out with whoever meets you at the start of your stay so this can be explained - we managed to get around this by using the hob/microwave to cook and also eating out. Though the area doesn't have particularly fancy restaurants or cafes/bars (that we could find by wondering around - a bit of prior research may have been helpful), there are good travel links by the metro or bus which are easy enough to find with the maps we received upon arriving at the apartment. Also, having wifi was fantastic as we could use our smartphones to find the best routes (I would really recommend the app Citymapper - it helped us find our way around Barcelona to no end!).
It gets very hot at night and the apartment did not have air conditioning so we had to use the fans instead but there were only two so some of us had to put up with the heat a little more, but this wasn't too bad.
The area is nice because it is quiet but at the same time, only a 10/15 minute walk from la Sagrada Familia and a 25 minute walk to the beach at Barceloneta. As a group of students, this was great because it meant we could enjoy the nightlife by the beach (there is a selection of clubs inc. Opium, Shoko and Catwalk etc.) then walk home afterwards - it is also fairly close to a club called Razzmatazz which is supposed to be really good as well though we didn't manage to go.
The people who greeted us when we arrived were very friendly and helpful and we found our stay to be great!