As I have said I have a studio not the GO! but as to fabric waste-
I don't buy the square or strip dies- I can use my rotary cutter for those-and there is waste. But for triangles I LOVE my cutter! the one I use the most is for 3" finished HST( with the corners docked)- for a 24 block quilt I cut 20 4" strips of 2 fabrics then run them thru the studio.
In 30 minutes max- from making fabric choices to all cut and ready to sew.
and yes I am wasting about 1/2" per strip or 20" for the quilt- which does add up
I love the dies for scrap quilts I have the mix and match sets and have a pizza box labeled for each die shape. I cut all my scraps into shapes and put them in the boxes,ready to sew! Really uses up all that fabric we hate to throw away!
My next die purchase will be for the wedding ring- something I would never cut by hand!