I used both the lvl35+ Ghost and the lvl66+ Ghost.
I found the Nike Method putters better.
I recommend upgrading to the NIKE Method 001 Putter (L51+) putter, or to the Odyssey Versa #1 Black (L70+) putter.
"Drive for show. Putt for dough."
Par is established assuming 2 putts on each green, which is 36 strokes, or 50% of a score of par on a par 72 course.
We can recover from a not so good tee shot or approach shot, but it's a lot harder to do that for putts.
So many players consider the putter the most important club in the bag.