Accurate cutting is a given. If you can't cut strips and have them all the same then you will have a problem no seam will fix. I use the Go for 99% of all my block shapes because my manual cutting makes me frustrated. I have the Alto Quilt 2, three sizes of the Shape Cut, and the new Stripology ruler. I still misscut. So it's die cuts for me for the initial cuts. I may use a specialty ruler to sub cut those for the shape I don't have a die for.