What works
-installing
-creating geometry
-meshing
-applying loads and constraints
-giving properties
-analysing (with NX Nastran)
-seeing results
-importing .igs files

What does not
-i didn't encounter anything

What was not tested

-dongle

-flexlm

Additional Comments

I created simple case with beam. Then analysed it and watched results. With non-complicated models application works at full speed out of box.