I used the instrument program previously and this commercial program was equally effective! the online version appears more likely to provide enduring access over time. I purchased the instrument rating course previously and before the online option was available. Unfortunately King will only trade out by paying half the price for the course as an exchange fee after you send back the disks....seems a bit excessive, honestly. Otherwise, worked effectively.
Mark S.
03/14/2015
Commercial Pilot Ground School & Test Prep