This is an escorted tour, and quite frankly we were surprised and very pleased that they actually stopped at several key places and showed us around. It is not a hop-on hop-hop off, which we knew, but more of a personal introduction to the city. The only criticism would be that it was a little confusing to find the departure point, so give yourself 15 extra minutes. But once we found the company representative and found out where it departed--which is kind of obvious in hindsight--we were able to sit down close by, enjoy a cup of coffee, and people-watch while we waited for teh bus to arrive.
We're so glad we took this tour! We arrived in Stockholm mid-morning and spent the day exploring the old city, then took this tour at 0900 the next morning. IT gave us a good overview of Stockholm and some excellent ideas on where to go/what to do for the remainder of the visit.