Location is good enough, very close to Plaça de Catalunya and El Corte Ingles shopping center (turn to the left and you're there). If you get Aerobus from the airport you will be delivered exactly to the Plaça de Catalunya side from which 7 min by walk to the apartment.
Carrer de les Moles street is fully dark after 2 a.m. but it's OK if you're not used to come back home so late and/or you can use your smartphone to light the street keyhole ))
The apartment is on 3rd level (a-ka floor), no lift for sure ) Inside it has a balcony what is also nice. All the rest description fit the description here.
When you stay at an apartment but not at a hotel it's supposed to have some things at place like frying pan in the kitchecn, any soap in the washroom or if you see an ironing board you expect to have an iron ;) Nothing from mentioned above you will see there unfortunately.
Still we (me, my wife and son stayed here this time) liked the apartment and definitely recommend it to stay at for a week or even longer.