The YJ ZhiLong is a 58mm 5x5x5, which is smaller than most 5x5x5s. It is pretty fast but retains some stability, it feels somewhat similar to the YJ MGC and the aochuang wrm but is faster than both with quite a simple design. I think people will like it if they want a smaller 5x5x5 but otherwise the Aochuang WRM is better.