Yeah I didn't understand that either, unless as the other commenter mentioned they allow you to do a cashless exercise as you vest, however you are still possib

Yeah I didn't understand that either, unless as the other commenter mentioned they allow you to do a cashless exercise as you vest, however you are still possibly subject to AMT. AFAIK all ISOs are possibly subject to AMT whereas if you convert it to a NSO its just regular income.