Trainmasters TV did a series featuring the ProtoThrottle. Check out those videos for an introduction to the throttle and discussion of how it can be used on your model railroad.
Part 1 of 4 - Introduction to the ProtoThrottle
Part 2 of 4 - ProtoThrottle, setup and configuration
Part 3 of 4 - ProtoThrottle, momentum with CV3 & CV4
Part 4 of 4 - Coming Soon!
Another excellent review by Shane Mason:
Watch the ProtoThrottle in action on professional locomotive engineer Tim Garland’s Seaboard Central...
Watch the ProtoThrottle in action during an operating session on Thomas Klimoski's Georgia Northeastern Model Railroad...
Two short videos produced by Joe Atkinson explaining how the ProtoThrottle has made his layout operations more realistic...