Force Feedback is supported in Pro Pilot, so you should be able to feel the jerk of the start if you have a compatible joystick. Pro Pilot also has a complex radio stack that allows you to switch frequency and monitor different people in the air - airwaves, that is. You can hear chatter among other pilots and from ground control. Make sure you have tuned into the right frequency though, as the radio is not tuned in by default. I spent a long time flying silently without knowing why I wasn't hearing anything on the radio.
Information regarding navigational guidance and tower control are crucial to a successful journey.
This device relays satellite information to help a user pinpoint his location and navigate to the destination. The GPS identifies airplanes, airports and obstacles, amongst other objects. It definitely made navigation easier for me. In terms of documentation, Pro Pilot provides a thick reference for pilot-wannabes. In addition, Sierra has included over 30 movies that serve as ground training.