-
I used my bagman on the Great North Trail in August with a Nelson Longflap with tent and all the trimmings. No issues on rough descents.
About 10 years ago I once had a screw work loose during a ride (not the centre one but one of the side ones) and the thing disintegrated onto my back wheel. But I check the screws are tight from time to time now and it has never happened again.
I've also used a rack for support plenty of times. I think the rack is actually slightly lighter and more versatile, but I prefer the bagman if only hauling Carradice as, especially if there is not much in it, the bag can sometimes slip down at one side on a rack.
I feel like people are frequently reporting the screw in the middle of the bagman has failed but maybe I'm doing a confirmation bias thing.
Bagman has worked really well for me for commuting with a lightweight bag on roads, but I wonder about a loaded super c on bumpier terrain.