The flat is super well located in Barcelona so you can explore all by walking or easily take the Metro to go to Park Guell for example.
If you come by car you can park in the Sabba parking on the other side of la Rambla. Book online multiple 24h tickets so the price is very acceptable (about 65€ for 4 days).
The flat is nice, big enough for 4 to 6 persons. Well equiped, comfy with the 2 bathrooms.
We arrive with the door code and safety boxe to get the keys as explained by the host and it was very easy and practicle !
If I comeback to Barcelona with friends I will book this flat again !