Jury is still out pending river miles
Pluses: Well constructed. Strong. Ver good clean welds. They look and feel professionally made. I don't think I'll ever break them. They are designed to only release during a catastrophic event so i shouldn't have a problem with my locks binding or oars popping out. And if they do release, you can set the oar back in the horn and row to a place they can be reset.
Other plusses are no wrap needed, no sleeves, and no oar rights needed, which saves cost on the outfitting of the oar. So for $120/pair its about a wash vs the cobras. The shafts are longer so you can shim them up, which might save cost vs buying higher towers. Right off the bat i think you get about an extra inch of height vs a cobra
Another plus is the uhmw material feels "greasy" which should mean lower friction
Minuses: Regular oarlocks are brass and seem to wear faster than the towers. I'm no metallurgist but i think aluminum will wear before stainless. I'm afraid at some point i might need to drill out my towers and start using replaceable bushings
Other big minus is the collars that connect to the oar dont have a solid grab means. I'm not a fan of the clamps they ship with i think this should be a solid collar with some setscrews or use a bolt like the grants
Other minuses: the collars on the swivel have an ID that fits over the fat end of a sawyer oar. So it has a little bit more of a gap on a bare cataract oar. But the gap is too small if you already have grants sleeves or rope wrap
I personally would rather have a bit looser fit to still use the sleeves as I'd rather have these get worn then the finish on the shafts. I guess you can always respray the poly coating after each season. So in that case I'd rather have the tighter fit.
I do think the plusses do outweigh the minuses however