The apartment has a great location if you want to stay a bit from the center. On about 15 min, you can walk to La Sagrada Familia, which is so stunning.
In the area, there are small shops where you can buy some groceries and water if you decide to cook in the kitchen, which is quite small but functional. In about 5 min by feet, you can come to the metro station called Alfons X, which can transport you to the center. This is surely the easiest and fastest way to come there, since it takes about 1 hour by feet. I would recommend people to buy a 10-tour metrocard for the stay, which I found it necessary.
The apartment is clean, light and functional. Everything is working perfectly and the wifi is great. Only bad thing about the apartment is, it can be a bit noisy... You should bear in mind.
Enric is a great host, who is easy to communicate with and as well very flexible, when it comes to the getting the keys etc.
Thank you for a nice stay.