I like the big, obvious circles on it, and how they're slightly shifted (the first and the third and the second and fourth are the same). I'm also able to knit this without the pattern, just by looking at it.
However, it's a 3 stitch cable pattern (that's why it's so big), and it can be a bit tedious to cable the stitches to the front and back. But I'm very pleased with the result.
I've made the cover before:
Both have been sold, new covers will be knitted on request: