I’ve done NaNo now since 2005, and ever year except once (2009) I’ve reached 50k words and been a ‘winner’.
But here’s my confession: except for the first one, I’ve never actually finished the entire novel. I’ll write a brief summary paragraph and I’m done, even though the story isn’t.
My 2005 novel eventually reached ~120k words, and is more or less complete, as a first rough draft. I’ve never read through it, and I actually lost it for a couple of years, moving from computer to computer.
I tried reading it last year, but it was so rough and in need of so many fixes, I stopped and left it alone again.