I love the Simplicity Bias tape maker machine with 2 1/2" attachment. It works great. It can spit out binding for a king size quilt in no time.
The Simplicity 2 1/2" bias ruler takes all the frustration out of cutting bias. I'm glad I bought it.
The Go die cut machine is the best quilting tool I've bought other then my sewing machine.
I really like Inklingo. I use it more then I thought I would. It's great for hand piecing.
The one item that wasn't worth the money for me is the Alto Quilt 2 cutting system. It's great for cutting strips but I never get accurate squares or triangles using it.