This cube is very sandy. It is very tight OOTB. Lubing only helps a little bit. Corner cutting is awful and it locks up a LOT. I wouldn't recommend this cube unless you're just starting 4x4.

Dropping one star because you have to do a *lot* of work to get this cube up to its full potential. You'll want to take out the springs and put in thunderclap 3x3 springs in, magnetize it (I used 3x1.5 N52 edge to edge, 4x2 N35 in the outers), and then carefully tension the cube. Lots of work, but with magnets, the softer springs, lube and setup this cube is fast, buttery, and stable. Tension wise with the spring swap I run it tight, so the bolts remain slightly covered when separating the top of the cube - this eliminates catching issues on looser tensions for me. Inner layers feel better than the Aosu GTS M, outer layers are buttery. Angstrom lubes work great in this cube.

great cube but it's problem is the fact it locked up a lot.I saw some plastic that was blocking movement so I removed it.That was a very big mistake.I did it to all 6 faces of the core.It locks up less and I also did the spring swap.I think it's just me and a few others who got this.It's probably really good.I wonder how Im gonna fix it.

To be completely transparent, this is a pretty bad cube with stock springs. It is slow and has really bad corner cutting. All you need to do is put Thunderclap v1 3x3 springs in and some cubicle gummy in the core, and this cube turns into one of the best on the market, better than the Wuque. I also put some silk and DNM on the pieces, my 4th solve was a pb single, don't buy the cube unless you are going to do the spring swap. Otherwise, I would recommend buying a Qiyi Wuque.

This puzzle has amazing performance and is very sandy and slugish out of the box, when i got this puzzle I broke Pb’s like there was no tommorow. I did has a very small problem and it was probally only for my cube, the center cap keeps on falling of. Im sure that was just because when I finsh solving the puzzle and when i hit the timer. But anyways,its a Very good budget 4x4 for its price.

This cube is really slow out of the box but about 2 weeks of breaking it in its amazing!!!! It does hurt your hands when your turning really fast but only for parity!!

El cubo es muy bueno, únicamente si cambias los resortes de fábrica por los del thunderclap 3x3 (que lo hacen inestable pero RAPIDÍSIMO) y lo magnetizas (Lo estabilizan mucho).
Es el mejor 4x4 para hacer Hoya, hasta ahora el WuQue no me terminaba de convencer y por suerte encontré un cubo que se adapte a mis manos chicas y mis necesidades como cubero.
Perfecto para manos chicas, muy bueno para hoya.
10/10

I don't see how you can rate this 5-stars if you need to swap out the springs. It's really tight and squeaky no matter how I lube or adjust tension using the original springs. If you need to modify it then it's not a perfect score.

I got the YuXin Blue 4x4 as a Christmas gift, and it was very smooth and fast out of the box. However, it was a bit unstable on my preferred looser tensions and tended to lock up during 3x3 stage. Luckily, my parents also got me the Qiyi Thunderclap springs with the cube, and after swapping the springs and lubing with Silicone Lube Weight 2, I got a fast, smooth, and slightly sandy cube that was very stable on any tensions. The inner layers are very fast and parity is easy to mess up with an inaccurate turning style, but it can be made better with tightening and heavier lube. All in all, it is a great cube with or without the spring swap. I highly recommend this cube to all people.

This cube is great.. but only after adding thunderclap springs. I set it up using traxxas 50k, dnm-37, and silicone weight 0.3. The final result was in my opinion better than a qiyi WuQue!! BUY!!