I don't have a roccbox but a friend of mine has had one since fairly early in their US availability.
Getting it up to neapolitan temperatures proved a struggle for him, and he ended up getting a higher-pressure propane regulator for it.
He's mentioned that some users say that you have to increase the flame very slowly to get the included regulator all the way up to full flame, and maybe he just had one that was particularly finicky or never mastered the trick.
So, if you have the propane/gas version, I would say that using it at NY temperatures should be fairly easy. Get a good IR thermometer with a narrow angle to it so that you can have a reasonable idea how hot the deck is.
His other remarks, regarding the 1st gen wood burner, were that it presented a chore of sitting next to the oven and feeding wood into it. And since it produces a secondary burn, it imparts no wood flavor. But with the propane burner, you can throw some wood chips into the back of the oven before launching the pizza to get some wood smoke if you want it.