A bit disappointed here. The 5x5 was great and the 3x3 was good, the 4x4 was a different story. When I first got everything, it was winter so my newly unboxed cubes were cold and stiff. After a warm up and break in the 5x5 really impressed me, after lubing, even more. It was my first 5x5 but I could tell it was quality after tensioning it (it came a bit tight). The 3x3 was also cold and stiff, as well as unlubed. 5 drops of cosmic lube (and tensioning) later and it was amazing. The one problem of the 3x3 was is gets slippery easily and flies out of my hand when I do OH solves. Solution? Wipe cube with paper towel before solving one handed as well as wash your hand before solving to remove sweat. Now the 4x4. The 4x4 came cold, stiff (like the others) and scratchy. It was loose when it came so I tensioned it. It won’t pop too easy but will if you harshly corner cut it might. I drenched this thing in lube but it STILL has a bad, hard to explain feeling (not scratchy, but still, a bad feeling). Maybe if I clean it out, lube the core and relube the pieces it will feel better. The 4x4 also came with a weird mark that looks like superglue. Maybe some glue from the plastic wrap got on the 4x4? In total this buy was a blast, but setup is needed for great performance. (Also the price is REALLY GOOD for their [mostly] great performance [after setup]).