The tour guide was excellent - she made the tour very interesting and she got us to the first stage efficiently. It was wonderful to by-pass the masses of people. However, important to bear in mind that to get to the summit you still have to queue: the round trip took me an unexpected hour.
Very crowded indeed. The equipment the guide used was faulty and we did not hear a word he said. He changed the equipment twice. It was wonderful to see the Venus de Milo ..... the crowds around the Mona Lisa were the biggest I had seen .... however, it is a must to see.