A few poeple sent PM's asking about this tour company so I thought I'd put this here instead of replying separately.
We did the General tour very soon after arriving and we thought it was a good way to get acquainted with the city and some of its history and architecture. There is a morning and an afternoon tour both of which are approx 3 hours long which was just about right for us. The tour of the Jewish Quarter, which we did later in the stay, included a stop at one of the ruined pubs where we bought drinks and could use the bathroom, but the general tour did not. We liked the fact that the tour spent time on both sides of the river, rather than doing a Buda genral tour and a separate Pest general tour. And it was easy to find the starting point and the tour guide as opposed to other tours leaving from the same area.
There were about 3 - 4 dozen people in the tour and the guide's strategy was to walk for a while pointing out a few things, but then to stop, have the people gather 'round her, and then go into more detail about where we were. If convenient, she stood on a bench so that her voice carried batter, and we never had a problem hearing what she was saying.
In addition to describing the city, the tour guide also tried to teach us a few owrds of Magyar at one stop, gave her suggestions of which baths to visit, and a few of her favorite places to have dinner. And she was available afterwards in case people had any other questions. I think most of the people appreciated all of this information.
The tour is free and if you started it and felt it was not for you, you could simply walk away, hopefully telling the guide. There is a suggested tip which we paid and which came out to be approx US $10.00 (We were using 200 / 1 florints to dollars while in Budapest, just as an approximation as to what things cost) $10.00 for this tour struck us as a bargain. (In Paris there is a series of very good Paris Walks which are similar, but these cost 10 euros, approx $14.00, and do not last as long)
We would do this tour again on our next trip, and probably the Communist tour as well.