Sounds and FEELS unstable, like there's a bumpy track or one of the balls is not perfectly spherical. What in the world is going on here? Not worth the price at all. What a waste of time, money, and materials.

Platinum & Gold: These two share similar characteristics. They are both 8 balls, super quiet and long spinning. For some reasons, people have mixed reviews for the gold one. I find the gold as good as the platinum one.

Stainless: This is 10 balls, louder, and long spinning. Some YYR yoyos come with this bearing (for example, bae).

Summary: You can't go wrong in getting any of these. They are high quality anyway. My personal favorite is the platinum one

That first throw was very unexpected, it sounded so crazy smooth. After 16 years of yo-yoing, I never thought the bearing made a significant difference... not anymore! Just tried a speed combo that frequently causes snags on any other bearing or yoyo I have and this thing just cruises right on through it. Wildly impressed! Won't hesitate to spend this kind of $ on these bearings again when I need em'! (I got the platinum)

Only problem I've encountered is I have a much harder time determining spin power after a set of tricks because the bearing is so quiet. I'm sure I'll get used to it

I tossed the Gold on my Zeekio Murder and with the new Ka-Pow crimson strings it's night and day from my last bearings. I will only snag these and they are three dollars cheaper than the NSK so I don't know if they are any different but I don't need to even compare because these are now my only bearings until the platinum comes back in stock. Seriously why are you still reading, but these bearings.

If you were looking at those thinking is it worth? it will actually change the way my yo-yo plays? I ordered a platinum thinking the same thing. And my god yes it does, it’s incredibly smooth, the spin times are unreal, and build quality is sturdy. It’s so smooth in fact I get nervous that the yo-yo stopped spinning it’s scary smooth.