Currently it's free. Its functionality is only composed of parts and assemblies, but for the price (did I mention free?) it can be a great translation/training/practice tool.
You can download it from Autodesk labs here!
As for me, I was busy geeking out at the Chino airshow by my home in So. Cal. There were a ton of WWII era airplanes there, and I was in my little slice of heaven.
Here's a couple of pics.
