Hard to believe......
As a hard core simmer and aviation historian I was thrilled to see the aircraft of the 60's modelled in a sim. I remember reading National Geographic articles during the Vietnam War and wondering what it would be like to fly those Phantoms, Crusaders and Skyhawks. My first exposure to the Thunderbirds was when they were flying the F-100 and I had a toy F-100 that I played with constantly as a kid.
As an IT guy, I found it encouraging that the elements of the sim were so accessible to modding. Even without a mission editor it is fairly easy to work up a decent mission, TK appears to have made custom paint jobs fairly easy to do (not my forte, though..) and the wealth of add-on aircraft while not as prolific as MS sims is still remarkable. I won't get into it more than this but there are some sim devs that could learn a lot from TK's biz model.
My most flown sims at this point are the TW series, TAW and Jane's F-15. Eye candy is nice but I have a fairly modest machine based on today's standards and I've been doing this for long enough to appreciate content more than glitz.