andyzhangdayu
Regular
From: WitEden
When: Mid-January 2012
Thoughts: So far, this is the "fastest" (by that, I mean it takes the least effort to turn) cube I have ever tried (with the exception of an eastsheen 5x5 but that doesn't really count). I can't comment on how easy it is to control because I have greyscale stickers on mine and my recognition is awful with them, so I don't have a very fast F2B/F2L. The only negative I can think of for this cube is the screw length: for mine at least, they were too long (I've screwed each center the entire way in and it still feels fairly loose). I don't mind Its current tension (I'd say it's just right) but for someone who maybe doesn't want torpedoes, they may also want shorter screws (of course personal preference etc.).
I think you better put a second washer to the screw (on both side of spring) instead of one currently. This will make the tension tighter. If you don't need torpedoes, you can go for a Lingyun I, I know Dayan doesn't produce any Lingyun I though.