I have completed NaNoWriMo 2008.... and am a winner. I stopped just over 50k words, at an ending... but it is not the ending... as it turned out I kept writing even after submitting my winning text.
It was a journey I'm glad I took, since I haven't written fiction in almost 12 years--and it turns out I did miss it.
At my worst, I was 6.61 days behind target for finishing on time... but since I'm a geek and kept track of my word count by day, I realized it and corrected course--and finished 2 days early. Woot!