Jachym was our guide. Contacting "Prague Local Friends" was easy and communication was pretty awesome in terms of speed and to coordinate location. We opted for the 5 hour walk leaving Jachym being the one showing us around. It was a great decision. We visited so many places, got a nice story lesson and we finished the tour with a nice cold beer. I took my wife and two kids (teenagers) and they also had a great time. Highly recommendable to anyone.