I have a few sets of the Cubics (set circs). The square shaped needle shanks are wonderful!
It's much less stress on the hands and wrists. The cords are fantastic!
I love the Dreamz set of interchangeables. I don't own them,
having invested in the KP Harmony's few years ago. But I would go for Dreams over Harmony because the needle shanks are color-coded. Each size is a different color. Plus, the cords are superior IMO.