I have them all, I think. Thought I *had* to have the Pro, but have since realized that it is very limiting because you can only cut increments of 2.5". If you have yardage that you want to cut into jelly rolls strips, then that is nice to have because you are cutting a lot of strips from one piece of fabric. Otherwise, if you are cutting a wide variety of 2.5" strips from many different fabrics for a quilt, it is easier to use the other Shape Cuts.
In my opinion, the Shape Cut Plus is a much more versatile tool.