Hi there!
I also have my DPT from the US.
However, I received my BSc. Physical Therapy from Jamaica. I submitted both curricula to the board and received my registration without any need for additional courses or doing a competency exam.
I got my registration approved in October 2016 and have been happily employed since December 2016. The environment is great! I'm in Auckland so I can only speak specifically about that area, but it has been a very good working experience. New Zealand is truly an amazing country to start and build with your family.
Feel free to shoot me a private message for more info. I'd be happy to help!