I saw it in 1999, it was not very finished, but already an impressive sight. We tried to climb the tower, but it was very busy that day (probaby like any other day).

We did visit Park Guell, though, on that same day, which was less crowded, and that was incredible.

If you haven't been to Barcelona, it is an amazingly beautiful city. We only spent one day there, which is far too little to do the city justice.