When I started I thought the dies were expensive but after using them and saving the time from cutting and the accuracy of the cut my time alone and the lack of wasted fabric it is all worth it! Also, when I buy them on sale I usually buy enough to qualify for free shipping and they don't charge me the state tax, so another discount for me.
To get the best cuts it is best to watch their video - starch the fabric and place it on the die with the straight of grain going the right direction.