What score did you guys get on the 30 practice tests for the Nuclear Boards?
For me, the actual real exam was doable (not easy), but I definitely wouldn’t recommend taking it lightly. If you use standard resources and 2 months time (Initiate prep 2 months before but serious prep of 1 month is adequate), you'll be well-prepared, but it's not a walk in the park. It's definitely doable, though. I am 100% confident about passing my nuclear cardiology boards, just like I felt after my echo boards. Good luck!
Edit: Update on preparation time: It took me about 1 month, but I recommend allowing at least 2 months to start preparing, with around 30 to 60 minutes a day to get used to it. However, serious preparation for 1 month with 2-3 hours per day should be sufficient