August 2, 2017
2/6 bearings were decent... and I mean borderline decent. no better then my old bearings.
Edit: They sent me a new set pretty quickly. The new package was better then my last set I had received. 5/6 were alright and could be used to replace dead bearings in some of my printers, the sixth was a little stiff though feels like a ball has a flat in one of the races.
September 6, 2018
All work smoothly very happy would buy again
March 9, 2017
Not really any worse than a typical chinese LM8UU bearing, but ensure that you buy at least 3 for every 1 that you need so you can pick the best one.
December 31, 2017
Terrible product as they are noisy and damage shafts quickly. Replaced these units with Igus units for less. Avoid these bearings at all cost.
December 5, 2017
Comes in a pack of 6 - all of them were unusable. Even when lubricated (lithium grease) they made a terrible sound and did not move smoothly. I highly doubt they are new. Do not buy them. Pay a little bit more and get Igus bearings.