I have a DIY Square-1 from cube4you. It turns quite nicely, but, I imagine it turns better with lube. But I'm too scared to take it apart. Oh well, it's not like I can solve regularly anyway.
Actually, the DIY does come preassembled. That's why I'm afraid to take it apart, since I have no clue as to how the mechanism works, I don't want to break it.