Options to NZ
 

I posted this in the ANA forum, but suspect I may get more response here. If protocol requires it to be somewhere else, let me know.

I have enough United miles for one business class ticket to New Zealand on Air NZ. I also have about 50,000 Starpoints and 50,000 membership rewards points. As best I can tell, I can transfer these to ANA and then have enough miles for a second business class ticket on Air NZ. Am I missing somethig? Is there something I should be worrying or thinking about?