These roller J cups are good. Having any roller J-cup seems like a huge upgrade in my opinion. However there are two issues that have left me wishing I had purchased a different roller J cup, especially for the price. First, the fit on my rogue uprights is mediocre (one fits like a glove, the other is fairly loose). Next, the pin that goes into the upright holes is screwed into the J cup (I have the 5/8" version) and it can loosen. Every time I move the J cup on my upright I have to check to make sure it is screwed in tightly. I suppose this could be a feature if you change between 5/8" and 1" hole racks as it allows you to change the pin, but it is a bit unnerving that the pin seems to loosen and screw out if I'm not careful. On the other hand, all the UHMW over areas the bar may come in contact with is quite nice.
Performance
Value
Build Quality