last year I did that, I just did it without worrying about time, year before I did it as fast as I could ( as did a bunch of other HNers ), I got a fair few top 100 placements and finished the entire thing....super stressful, but fun. Last year, doing it in a relaxed manner, I never finished them, I'd just keep putting off doing the next puzzle.

This year I think I'll just watch from a distance. I think it is really worth doing it as fast as you can at least one year, it really highlighted a bunch of areas I was quite rusty in.