Immediately post-operatively you should not expect a resolution of pain or weakness. However over time (4-6 weeks, but maybe longer) you should see signs of symptom improvement. Typically after a period of recovery you will need physical therapy to improve your neck musculature. But remember the major reason to perform surgery is to prevent symptom progression, and future problems. Good luck.
All material is frozen to remove any chance of infection/pathogen.
My ACDF was done with it 8 years ago and is still going strong, I've heard too many horror stories about the hardware. Good luck.
Fortunately I was able to work through the fear and anxiety that often accompanies surgery. I only spent 24 hours in the hospital.
Good luck to you and feel free to ask me any questions!!