||I changed my wheels and while I was at it I got 4 of these bearings to replace those I thought were a bit worn down. I noticed straight away that some of the wheels were immediately louder, sound-wise, they made more noise. I took the wheels off again and it turns out the noisy wheels were the ones with these bearings in them. I switched them with the old bearings and the issue was gone. Function-wise, they were ok, but because of the noise I'm afraid I can't say I'm happy with them.
So while my experience with them wasn't too good, I'll give them 2/5 due to that they did their job ok. Only too noisy.