All transportation cards expired half way which seems like a frequent "bug" among buyers, as metro station employees who issued substitutes told us. Other than that, the most popular place of imterest (Sagrada Familia) should be included, even as a small discount if free is not possible. Visitors should be informed explicitly that not all transportations are included (eg. night bus lines N*).

I would recommend picking up your card at the airport upon arrival, finding a BCN redemption locations can be tricky, and not all of them are open hours that may be convenient for you. Also recommend printing our your purchase slip, rather than using the one on your phone display, they had issues validating mine using the booking code on my phone.

It is great value for money. If you have more than 3 days it is really worth it. We managed to see Picasso museum and the Joan miró museum, both wonderful experiences. The art pass process is fairly simple, but remember to keep the original booking from art pass not just the GetYourGuide voucher. You will be asked for it at the museum.

It was super easy to exchange the voucher for a ticket at the airport without having to struggle with ticket machines. The only down-side, I didn't get to explore the discounts that the card offered but there were really a lot of options!

Necessary for your mobility in the city!! Also some attractions offered were very interesting! The only thing that i didnt like was that after midnight (when the metro was closed) we couldn't use it for night buses.