This is an awesome apartment. We were a group of 5 with my wife, her parents and sister. The apartment is well located close to Sagrada familia, 4 min to the metro, also lot of bus stops nearby and many nice restaurants. Her parents really liked the stay, having terras overlooking the sagrada familia. We had cooked and had lunch at the terras, which was quite a memorable experience for them.
The host and the stay u-nique team is quite responsive. HIGHLY RECOMMENDED if you are traveling with family.