Location is really close to Checkpoint Charlie. You might want to make a reservation online. When making the reservation online you will need to pay and you also choose the trabi you want to drive.
The trabis are old, they were made during the comunist era in DDR.
The way the tour goes is you get to the Trabi World location. They will let you choose the trabi and will explain the route. The tour lasts about 1 hour and 15 mins. The main rule is to follow the leading car to whom you have a radio connection abd the guide will explain you the route, show you attractions and tell you stories about the old times in East Berlin.
Don t worry about driving the trabi as it is pretty simple. About the only real special thing is the gear stick that is situated next to the wheel.
Don t worry about falling behind because they will wait for you. The only warning I would have is be carrefull how you brake as the car is old and also if you are tall you might have space problems.
There is a shop at the location to buy trabi toys, tshirts and other souvenirs.
A must do when in Berlin as it is fun, quite an adventure and you also do some sightseeing.