I would get a June Tailor Shape Cut mat instead:
http://www.amazon.com/June-Tailor-Sh...dp/B000YZ7SJM/ (this is the one I have)
or
http://www.amazon.com/Shape-Plus-Inc...dp/B0001DUMTA/ (a newer version)
Here is a link to an older thread that mentions the Simplicity cutter:
http://www.quiltingboard.com/main-f1...s-t218202.html