Me and my friends (4 in total) have been at Marta's aptm for 3 nights at the end of May. We arrived during night and Paul was kindly waiting for us!
The position is wonderful! You can reach the Sagrada Familia and the metro station in 2 mins (or less) by walking.. In the area there are nice shops for souvenirs, a few bakeries where having breakfast, little restaurants and,-just downstairs the aptm- a very equipped little market! The area seems to be safe and quiet.
The house is really nice, not too big but confortable for 4 people. Furniture are not really modern but they are ok for a little stay in the city! I suggest to bring water with you since you will not found bottles in the fridge/kitchen, for long staying and cooking you would need to buy main ingredients (oil, salt, sugar ecc..), we were not able to find toilet papers (olny 2 at arrival), detergent for kitchen/wash machine. The main bathroom is big, the secondary a little small (the sink in particular).
Anyway the staying was nice, house was good for us, Paul was available and vey gentle! Thank you so much Paul!