We queued for about half an hour to get tickets to see the church and enter the towers. We could have booked online and walked straight in, but the queue moved quickly, the weather was fine and we spent the time examining the exterior of the building, which is just as splendid as the inside.
We spent several hours inside the church and took hundreds of pictures. The museum underneath the church is well worth a visit also. La Familia Sagrada is positively the most beautiful church we have ever visited!