This is the second year I'm trying it. I ran out of time and got only 7 sketches finished the first year, but they were done traditionally and I saw it as an opportunity to practice inking by hand, and to do something different that I rarely do.
I was reluctant to get into this challenge because I work full time and already need to spend a lot of free time on my comic pages, but I don't practice sketching very much outside of the sketches that I make for my comic pages.
This year, I'm not sure if I'll have enough time for traditional inking, but inking digitally freehand is still a challenge for me because I work mainly with vectors. Drawing freehand requires me to be more careful with making sure I get proportions and perspective correct on my first try because those are more difficult to correct. Because I always sketch my pages before vectoring them, improving the sketches means fewer corrections need to be made, and I can make pages more efficiently.