I've owned Marathon Steels for three riding seasons and they are by far the most comfortable (on and off the bike), all-weather boot I own. They breath exceptionally well and are equally comfortable in cold weather as hot. I've had absolutely no complaint with their water-proofness either despite a small design flaw.
The lower ratchet strap can tend to want to poke its way into an overlapped, leather seam around the ankle. It takes no effort to guide it over it so it doesn't, but I didn't notice this for many a mile and as a result the strap has penetrated that seam, breaking the threads. They don't leak there and I think it would be impossible to sew without damage to the inner liner, so I've left it alone. Now that I know better, the same has not happened on the other boot. And now that you know, you can prevent it and enjoy an otherwise, awfully wicked pair of boots.
IBA, MOA, ONS
The mind knows no speed limit.
'06 GT - CGM "Katie"
'84 Airhead "Rita"