I have 2 different styles of the June Tailor tools. I love them & have used them for strip cutting, cutting bias, & also fringe on fleece or rag quilts. Nancy zieman has a short video on cutting the fleece using this tool, which was faster then how I used to do it.
http://www.youtube.com/watch?v=bSLBVCCuv6s.
Another review of these tools, where she suggests the best rotary cutter was the Fiskars 28mm for success with the slots.
http://www.quiltersreview.com/articl...t/010709_a.asp
I forgot to mention you DO really need to be cutting straight upright not leaning off to one side with your rotary blade.