Hi,
I also have neck cracks. For me I can hear a pop every time I turn my neck. I had this before treatment and for me this is a symptom that has not improved. I have just completed treatment and I did notice that the knee cracks that I have had for as long as I can remember are gone but the neck has not improved.
Good Luck, I would be interested to know if there is anything one can do to improve this as well.
Momo3