Tour Guide, Enrique, was very knowledgeable. And skip the line was essential if you want to see so many great places in one day. The only thing missing was inside visit of Casa Batlo, which is a must if you are in Barcelona.
This was surprisingly a great tour. We did not have much expectation, we just wanted to get to know a bit on what we should see in Barcelona during our stay. But the tour guide lady was very very knowledgeable and passionate. We learned a lot and got super excited about almost everything.