The place is nice and close to the metro and Maria is very nice.
But Marija does not live in the apartment which mean you can not check inn after 01.00 am. For us it was a problem because our fligth was delayed, so we arrived in Barcelona in the middle of the night and could not check in before 11 am the next day. so we had to find another hostel that was not fully booked (which was difficult) and ended up spending 100 eur more to stay at the other hostel from 6 am to 10.30 am so we could get some sleep while we waited for it being possible to check in at Marijas place. So very nice place, but i would not book it if you arrive late.