Gerard’s apart is very nice. Great location as it is in a residential area, but right next to a main station, so travel to the main areas of Barcelona is very easy.
The balcony areas are huge, and lovely to spend time on, and the AC is very good inside if you don’t like the heat.
I would say the apartment is probably more suited to a couple, rather than 2 couples because the living area and bedroom partition is just a sliding glass wall - unless you don’t mind that. The sofa bed is really comfy though, and easily big enough for two.
Would 100% recommend for a trip to Barcelona.