We all have different mouth sizes and each mouthpiece has to be tested.
For a "normal" mouth the 5C is perfect. Clear, mellow sound typical of a "C" cup, and very good sound attack helpful for staccato.
Your notes range will only depend on how much you practice.
Out of the box is shining, however it loses the polish after 2 weeks. Also one must be careful when inserting in the trumpet as it gets easily scratched and that may be a reason to reject the return if for any reason needs to be returned.