My friend and I stayed at the apartment for 10 days. It was big enough for us and we had our own bathroom. Sharing the kitchen was no big deal, we had some space in the shelf and fridge. Alfredo was a very good and friendly host, who helped us whenever we needed it. Check in and check out was easy as well as communicating with him.
The apartment was located a little bit outside of downtown Barcelona, but the subway, which is only 5 minutes away, takes you there within 15 minutes. There is also a supermarket, a cafe and an ATM next to the apartment.
I totally recommend this apartment if you don't mind sharing space with other people.