Disappointment here as well with the NP Mission HC Round Toe 5mm Booties, but for different reasons: The main being that the booties are substantially smaller than the chart is indicating. I'm a 8.5 or a 9 at best and the booties coming in as a 9 are way too short and narrow. Of course neoprene booties must have a snug fit but not to the point the toes are curling in!
A size 9 on their chart is no bigger than an actual size 8 with normal shoes.
Whether it is with their wet suits or their booties, I never seemed to have any luck and never been able to find NP a good fit - even when jumping one or two size up. Maybe my morphology doesn't match that of a European anymore! Ha!
In addition, I bought the booties from Kitty Hawk Kiteboarding, but they ended up being shipped 3 weeks after the order was placed! And they were shipped from the Neil Pryde US importer which also previously gave me a hard time with a defective NP mast extender back in June. So, I don't want to sound overly critical but Kitty Hawk is quite loosey-goosey: no updates on delivery, no spontaneous communication, slow answers to questions and at times no answers at all. Clearly, whoever is running this business might be more often on the water than dealing with its customers.
Besides that, the booties are nicely built and would have been a nice addition. In the light of all this, the booties are going back to the store, and since it doesn't appear they have a size 10 in stock, my experiments with NP are coming to a close! Luckily, I have 3 months to give something else a try!