Our tour was very informative and the Sagrada Familia itself was amazing. Our tour was in both Spanish and English which was fine and our guide spoke rather fast but it was necessary to get through everything. My audioguide died before the tour was over but I was able to stay close enough to our guide to hear everything.

The fast-track option was really very convenient and worth it, I highly recommend it. I would not recommend visiting such a landmark without a tour guide. Our tour guide was very knowledgeable and competent, we wouldn't know where to start and what to look at without his help. Besides that the whole tour went very smoothly and easily thanks to him having everything organized, otherwise it would have taken much more time with all entrances, long queues and security measures. I do recommend visiting the Sagrada Familia and then the towers at sunset, tour starting 4 or 5 pm, it is really beautiful and the view from the tower is breathtaking!

I would highly recommend booking through this company. I used them twice for my trip to Barcelona and on both occasions the guides were excellent. Our guide was George, he gave an extremely informative guide around the cathedral. Some very useful information which if you had gone alone would have surely missed.