I have been using this cube for a few days now, and I really like it. It is nice and fast, and I have not done any lubing or tensioning. I previously got the QiYi Square 1, and after a couple days of using it, it suddenly got super tight and hard to turn. Even if I loosened it as much as I could, it was still very hard to turn. I have not had that problem with this cube. Overall, I think this is a very good Square 1, and I would definitely recommend it.