The current vaccine is at least 90% effective (effacy based on age and other factors).
This is my understanding as also. Well worth it.
You do NOT want to deal with the discomfort of shingles.
My Mother experienced what is best described as a mild case on her face. It didn't look that bad but she was in a great deal of pain, and she's a tough old broad. There was no 'discomfort' about it! I remembered that for years and took myself off for my 50th B'day gift of my vaccine!