As far as jammer arms go these are probably one of the better options. That being said I was able to snag these off market place, I do not think they are worth it new unless jammer arms are something you dream about. The free motion arms help a ton, I only use them for a few exercises: chest press; incline chest press; shrugs. Of course the build quality is great, but with all jammer arms keep in mind moving them up and down the rack can be cumbersome. Their wall mount is certainly a plus for those looking to maximize storage.
Performance
Value
Build Quality