I love the square shape. They really do help with stitch uniformity. The tips are nice and sharp. The cable is very very supple which sometimes makes it a little harder for the stitches to advance onto the needle when knitting regularly but they are GREAT for magic loop and or knitting from two circulars.
I love making things out of this yarn because it works up so fast. Beautiful colors - everything from heathers to neons. Great beginner yarn! I prefer to knit it on Addi turbos - this yarn doesn't flow as smoothly on wood. I don't like metal needles usually but I think they're really needed on this yarn.