We were 2 adults and 2 children ages 10 and 12.
As many other reviewers said you will be the coolest tourists in Barcelona. You will feel like a star.
Mathias and Matt were superb guides taking us around to see the highlights of beautiful Barcelona. The food recommendations were excellent too. La Catalana was a fantastic choice for lunch after our tour. I could have spent the whole day touring around Barcelona. The 4 hrs went by fast.
Your Facebook pictures will have more "LIKES" than any other pictures you uploaded.
Do not hesitate: JUST DO IT.