The are BOMBER. However, the craftsmanship is far from say, a madcatr frame. Their tolerances are not really tight, meaning two never look exactly alike. They are made in a local welding shop I believe. The lifetime warranty means send them back and they'll fix them, which for me has meant bending them back. It's not like you get a new one if you bend it. I've seen the shaft weld fail, under no stress, so I always carry a spare. I've switched to the stainless because welders have told me that it is less likely to have that weld fail (less rusting if the weld is imperfect).
They are heavy. If you use cobras they are just a little heavier, but much heavier than NRS.
So I've had two beat down flips with these, and both times the posi's were bent bad when I reflipped, but were completely functional. Since the two rivers were the Wind River in WA, and the NF Payette, having functional locks and oar(s) in them was critical. I can't say if I'd want these if I was boating no more than Class IV, as I keep Cobras on the raft (also now I have 5 cobras since I don't use them on the cat anymore) but I hate the cobras on the raft - always having to tune, TONS of friction, and limited range. If I didn't know any different they'd be fine, and Class IV isn't as critical to have oars in the oarlocks when you reflip (it's all relative, you always want them but..)
I urge people to decide whether or not the risk is worth it to them, that you may break an oar. As I said I have yet to break one on a right-side up boat. If you are not ready to be diligent in oar management, you might want to think twice.
Lastly I switched to cataract blades when I got these. Because there is no frication "stop" like oarlocks have, my oars immediately dove to nearly vertical when I let go of them with carlisles. Cataracts solved that problem.
I am a river, babe - I've got plenty of time, I don't know where I'm going, I'm just following the lines..... - "We are water" by Shaye