The PDW fenders provide great coverage for larger width 650b tires, and are fairly light. Installation is straight forward. A bit more expensive compared to some other fenders on the market.
You almost certainly will not be able to fit this to a disc brake bike with the included hardware. In my case that required stopping the job and paying $5 plus shipping to get spacers from PDW to fit the front fender, adding over a week to completion. The rear is worse as the stays are too short to reach the eyelets; I ended up mounting one to the bike's rack and mounting the second stay to the first.
This is the fourth set of fenders I've installed and far and away the worst experience.
I'm curious what the use case is here? Caliper-equipped 26" 650b conversions? In any event, this is my last PDW purchase.
On the bright side, now that they're mounted the fenders are stout. Not a rattle, and if they were any stronger they'd become a structural part of the bike. They also look like a premium part.