Hi, I have went through Guhongs, and Zhanchi's, but I still haven't got my perfect cube. I tried the Lubix Zhanchi and Lubix Guhong and they didn't work out. The problem is that my Dayan cubes are very easy to get dirty, and it limits its ability. I just feel the Dayans lose speed and performance after a few months or weeks. Another thing that happens is that after a little wear and tear, the cub suddenly locks-up, and you don't know from where exactly. I think this is because of the multile part pieces. Has this ever happened to you? I don't know what it is, but I'm tired of Dayans know because dirt and other dirty debris gets stuck in between the two-piece edges, and the three piece corners. Know what I'm talking about? I'm looking for a good cube preferably something really smooth and crispy, you know, the clicky feeling, or maybe you have some other suggestions for me, please feel free to give me suggestions. I 'm also wondering if anyone else has run into this problem, please let me know if you have. Thanks very much! And Happy Cubing!!!