I've been meaning to do this for years, but I either find an excuse not to, or I get everything planned, and the weather changes and ruins it for me.
I had no excuses today. Set off just before 6am, got home a little after noon. I probably would have been a little faster on a geared bike, but I decided to do it on my singlespeed at 79.1 gear inches. My legs are doing better than I expected they would (just barely), and my knees are fine. I think my lower back is most sore.
It was worth it. The last 10 miles were f'ing boring, though.