I first bought the Shape Cut (12" x 12") and loved it. Next I bought the Exact Eighths and the Half and Quarter Square and they are great. I use and Half and Quarter Square a lot just for trimming or marking, not just for 1/2 & 1/4 squares. I looked at the one with the 1/4" increments and decided not to get it because it is just too narrow. A few weeks ago, I got the Shape Cut Plus (12" x 18") and really love it. Walmart had the Shape Cut and Half & Quarter Square rulers on clearance, so I bought a spare of each.
You asked "is it just that wonderful?" My answer is a resounding, "YES!!!!!" I rarely use any other ruler.