ISU:
"Difficult entrance and/or difficult exit are part of the spin and have an impact on the GOE of the element."
(page 10 of ISU Communication 2324)
Also ISU:
"1) good speed and/or acceleration during spin
2) good controlled, clear position(s) (inc. height and air/landing position in flying spin)
3) effortless throughout
4) maintaining a centered spin
5) creativity and/or originality
6) element matches the music"
(page 6 of ISU Communication 2324)