Broke my first/original 54Tooth gear set in my 350 hub tonight. This has been my go-to 29er rear wheel across several bikes, over the last 6 years or so. I can’t complain. It’s the 5th hub I’ve broken in the past 8-9 years of riding. The other hubs were the standard 3-pawl designs, they just don’t hold up. I ride steep, rocky and root my NorthEast terrain, and have cracked a few frames as well. Not a light rider, but put down a lot of torque as I love the hard, technical climbs.
All that said, I’m buying another 54T ratchet set. No idea how many thousands of miles and millions of hard pedal strokes, but overall it’s the most reliable hub I’ve used. I have the 350 hub/54 tooth gears on two other bikes, they are worth the money I feel.