Just finished after dipping in and out through the day. I only tried this puzzle for the first time last week after reading threads about it here, and (so far), I'm thoroughly enjoying it, with (so far) a hundred per cent completion rate! I have a policy of staying out of threads about a puzzle I'm working on, so thankfully I missed Blair's spoiler.
Congratuations, sudokulover, on the prize; like you, I went down the wrong alley at 12a.