I would like to hear about the small group tours/guides that folks have used in Prague. -thanks
I can enthusiastically recommend Guenther at Kultur Cafe Prag:
He is an expert regarding Prague's history and tailored my tour to my specific interests. I had injured my knee and he graciously provided a strong arm for me to lean on so that I could see many sites I would have missed otherwise. The tour was definitely a high point of my trip.
My friends and I had a great tour (below) with Jason of Living Prague. Quite a few people here have taken one of his tours and been very happy.
https://www.livingpraguetours.com/tour/prague-old-town-jewish-quarter-walking-tour/
Another vote for Jason. In addition, his website is invaluable for planning your visit to Prague.
We've used Prague Extra Tailor Made Tours several times and would highly recommend. This is a family owned business run by Kamil and Pavlina. Super nice people!