Owned these for years. They worked ok. Always found the collar would always come loose during use. No need for these today though I enjoy collecting the plates.
Used white rehabbing shoulder. The functionality it was great though I was not working with much weight the time. The build quality was excellent. For me, I would use unless in a commercial setting.
Above average value compared to other plate loaded options at a similar price point. The build quality is good. Basic performance level for those just looking to add leg machine to their gym and not wanting to pay a fortune to do so.