||Very very poor spin.
I bought these to replace some ABEC7s I had which had non removable shields and were getting a little stiff. But those old bearings ran better than these bearings did fresh from the box. Even after cleaning and lubing them up a little they hardly spun for more than 2 - 3 seconds compared to my old bashed up bearings.
Quiet, yes. Pretty, sure. But not great at what they're supposed to do and a bit of a wasted purchase on my part.