Great exposure to Prague and a good suggestion for the first day to serve as a basis for future items you can circle back to in subsequent days. FYI that, like much of Europe, it is a lot of walking on cobblestones and brick. A great tour overall though.

Started out rocky. GYG said pick up time was 9:45-10am but tour company was there at 9:30. Got a call at 10 asking where I was! Been standing outside from 9:42! Anyway, now the driver/guide ran through the city saying on right you see this and on left you see that. We had no idea what we were looking at or time to take pictures. After about a half hour of that, we were dropped off at the castle and met our walking guide. She was very good and the rest of the day went very well. She was a very good guide and we saw a lot. Our included lunch was very good also.

I come from Indonesia and book a full day tour with Gray Line Tour. I end up with having a private tour only with the guide, Mr. Dvořák. He is really nice and explains everything clearly for us who don't know much about Europeans history. He absolutely know a lot of histories of Prague and around it, associated with the buildings, people, streets even sentiments between party instances. He even rearrange the timings with the weather forecast so I could experience Prague best, with a very good lunch. I personally recommend this full day tour for those who wants to learn a lot about the buildings and histories behind them.