Upon unboxing this cube was amazing, very stable, controlled speed and no lock-ups, I used it as my main for a while and broke Many PB's. I set mine up with a heavier lubricant on the pieces, providing a comp-stable cube. This way my cube was slower, allowing my performance in comp to improve. It has a very crunchy sound, but the feeling is smooth. However, as I used the cube more, I began to develop a liking for the 354, due to its smaller size and speed. The 356X began to be uncontrollable, and lock up. I had a good experience with this cube, and along with proper setup, can be perfect for almost any cuber, however for me, I just lost a liking for it, and would much prefer the 354M or the WRM.