Obviously. If you've toured it in the past, it's likely not much has changed. Allegedly, construction will be completed this decade, but they've been saying that for a century. If it's your first time, purchase skip-the-line tickets ahead of time (trust). Like the Eiffel Tower at midnight, Sagrada Famlia also peaks at a specific time of day... and that time is sunset, when the sunlight streams through the windows and the whole cathedral appears to be on fire.
48 hours in Barcelona