My wife and I stayed 2 weeks. The location is perfect, small store next to building, a few blocks from Plaza Catalunya. Next to subway station and bus stops. We were here during July 2018, the weather was hotter than normal and we were able to keep the apartment comfortable with the 2 a/c units. Hot water was quick and plentiful.
The things that could be improved upon: only 2 rolls of toilet paper provided, no napkins or paper towels in the kitchen, no dish soap (only a used bottle refilled with water), no wine opener, kitchen was marginally equipped, no salt, pepper, cooking oil, sugar or other condiments.
This apartment is not managed by the owner, unclear who owns. The contact person Gerard is very easy to communicate with and very responsive.
We would rent again, but suggest the owner improve upon the items mentioned above.