The nupps were easy to handle with the Addi Turbo lace needles--don't skimp here. But the nupps are definitely arthritis-aggravating so go slow in that section if you are unlucky enough to have this affliction. Or buy more Bengay.
I did notice a few times that I either forgot a YO here or there or I accidentally let it slip off the needle. But I managed to jerry rig a solution that's hard to see afterwards, though I did use a lifeline.
All in all it was a very fun and entrancing knit. Addictive even. Easy to block, too. What more could you ask for?