We took the 2 days bus hop-on hop-off tour. It was a very good deal since it covers all 'must-go' places and you could used it as much as you'd like to visit that place.It was convinience, the crew were nice and friendly, and available at almost all time. Even though the queue looked a bit irritating and long, nevertheless due to the sufficient coach availabilty, it won't took you long to wait. We also took the Monseraat and Gaudi's Colonia Guell half day tour, It was also conviinence and fair price! Very much recommended!!