We had a nice stay in this apartment. Good location: quite far from Barcelona city center but very well connected through the metro: only 5 minutes walk if you take the exit "Provencals". Supermarkets and bakery very close, on the way to the metro station. The apartment is pretty well equipped, the beds are comfortable and the area is quiet.
The automatic check-in worked really well and Stay U-Nique people have been really kind asking if everything was fine during our stay.
I will not hesitate to book again this apartment for our next stay in Barcelona.