No, it wasn't difficult...just patience.
The first time I tried to use my lil twister it was a disaster. It wasn't until I watched a Missouri Star Quilt Co. tutorial that I 'got it'! After that it has been easy.
Great looking quilt and made for a good cause. I love the fabrics you used. Was it hard to create this pattern for use with the twister? I always think this looks complicated but I suppose if you try it once, it would make more sense as to how to lay out the fabric squares color-wise.