No problem in Central FL pushing the zone limits of this tree.
It gets less credit than it deserves for being well adapted to our region (almost as cold hearty as a guava).
they've grown so big and fast near me, that they've had to be cut in half (40ft tree, to a 20ft tree)
In the wrong location, (like the NW side of a house, thats on the south east side of a giant field) this plant will suffer horribly when the temps dip below 32F (with proper dry windy conditions).
I'm not sure about it being a problem well outside of it's zone limits (say 9a), I think this tree could be fruited in a pot, and in a greenhouse up in Ohio. Although the tree will be a beast, and grow into a 25 gal pot in about 4 yrs with proper care.
The trick will be maintaining warmth, and suppressing the tree's size, and encouraging lateral growth.