Wynn, our tour guide was excellent engaging and interesting. Given the tour he did an excellent job. That said the general content is a bit dry especially for kids. We wanted to see the choir but a 5 hour tour wasnt the best idea for us. By the time we got there the boys were restless and totally disinterested. For older people, couples, people with religious interest it might be better suited.
It does cover a lot of the city and spends a fair bit of time at the capital building and stops for a decent meal (which you pay for).