My daughter, a Music Therapist, wanted to see a concert while our family was in Prague. I am not into Classical Music and she tried to find a concert that had a mix of music. This concert fit the requirements.
It was a cold, rainy evening and the church was cozy and warm. It took us longer to walk from our hotel than expected and we arrived 5 minutes prior to the concert. The one annoyance is having to print off the tickets, rather than showing the ticket on your phone.
The seating is first come first serve. We ended up sitting off to the side. The visibility was limited for some of our party due to columns in the synagogue. So arrive early for the best seating.
We left an umbrella on the floor near our seat, and when we returned for it, 10 minutes after the concert ended, we found someone had taken the umbrella. It was not turned into the Synagogue.