Excellent value for the money. The only thing I didn't like was the bigger trolley buses which almost looked like double decker buses. Too many steps to climb to get to the back and if the you sit at the back the driver is lost to you in the bowels of the bus. It is more like hop-on climb up, climb down hop-off. I liked the traditional style trolleys as seen in the picture, the driver is always visible (seems more personal). That is why the 4 star.
Excellent service. The integration between the main and Arlington loops worked well. Tour guides were great.
this is a great way to get around DC and not have to worry about parking. We were able to stop at many of the sites we wanted to tour and then pick up the next trolley for the next site. Highly recommend this tour if you want to get in a lot of sites.