The apartment, especially the bedroom, is rather large compared to some I've stayed in in other European cities. The bed/pillows were very comfortable! The apartment was perfect! Maria was very helpful in allowing us to check in early.
As far as location, the Gracia area is wonderful - we felt safe, and there are a couple of coffee shops nearby. If you want something other than Spanish food, there is a fantastic Syrian restaurant just on the corner steps away that we ate at TWICE! As far as proximity to tourist attractions, I think the location is great IF you plan to use the metro or bus to get to some places. Because of the situation in BArcelona with pick pockets we chose to walk rather than take public transportation. One day we walked from apartment to Gothic Quarter, did a 2.5 hour walking tour all through Gothic Quarter, then on our own we walked to El Born, then to La Sagrada Famalia (this is a MUST see!) and then back to apartment. 8 MILES!! If I was to do it again, I would probably prefer to stay in El Born as I think it is closer to most things I would want to see. But again, if you are okay with walking this much, OR if you plan to use public transportation, the Gracia is a great area. And this apartment is highly recommended.