Some good stuff in this one! New effects, new campaign strategies, crew transfer without EVA, new Space Plane parts, improved Navball instrumentation. My favorite part though is that you can turn off the ability to revert the flight back to launch, which means you have to plan and carefully design your spacecraft and staging sequence for the mission at hand. I think this will create far more 'Apollo 13' situations where something goes wrong and just getting the crew home safely will be a challenge. Now, where did I put my sliderule?