I love it.
Brings back nostalgia from my first few Mün landings and space stations. This game has for me, like many other people, been the "one" game I play.
Even though I am starting to lose interest in KSP slightly, I will always crack a smile when I see Jebediah on the loading screen. Whether it's to fly some planes, build a rocket, or just screw around with Kerbals, it will always be in my Steam library, beckoning me back.
I wish this made TOTM. Well worth it.