Prism, I use the fabric as it comes off the bolt as well, unless it's really wonky. I really haven't had a problem with it since the first couple times I've used it. I don't use the 60mm cutter though

When I started quilting, I only had a 45 and that's still all I use! I can see how the 60mm would take much more cutting space. Yay math.
I originally went with the Stripology over the JT because so many people said the JT was too thin. I love the thickness, sturdiness, of the Stripology. Never used the JT, so I guess to each their own.
Susie, I hope you love it! I love mine and I don't regret a single bit of the money spent on it. It makes cutting FUN!