I have two of these, one lives on a bike overseas. I bought a second one, and it is even better, they changed the material on the strap that cinches the fender to the seat post, and it holds better than the original, and the company then replaced the strap for my old one. Excellent.
Got this rear fender to match the Origami front fender on my CX bike that doesn't have fender mounts as I ride this bike in the wet off season and gravel rides so looking for something unobtrusive yet solid. Lightweight and solid but deducted a star as the strap that helps lock it to the seat tube tends to fall off when not in use as I take it off when carrying bike on a rack, etc.
Quick and easy to attach and take off. It could pose a problem if you have your seat slammed, but then you probably have other problems, if that's the case. Takes care of the back spray, but won't protect you from rear spray around your cranks, find a clip on fender that can do that and color me impressed.
I bought this fender to bring along on a week long tour. It easily snaps apart and back together. So, it's easy to pack in a bag. I used it a couple of times during the tour. It performed well, keeping my backside free from road spray.
I could go on and on describing how happy I am with this but, suffice it to say that in the long list of stuff I've bought for my bicycles, this things ranks right up there amongst the best money I've ever spent. It's light, folds flat so it can be packed away, and installs literally in seconds. I like it so much that I'm going to get a second one for my mountain bike.
This rear fender is very easy to set up and adjust, and offers excellent protection against rear wheel spray. The seatpost grippper stays firmly in place, so you don't have to deal with it sliding mid-ride and exposing you back end to water. The fender itself also detachesre-attaches to the mounting bracket, which makes the fender versatile for changing conditions like a wet ride to work and a dry ride home.
I appreciate the ability to remove and store the flat, foldable portion of this fender in a back pocket (or anywhere else) without removing the clamping mechanism. It's a feature I wouldn't have thought I wanted but I've ended up putting it to use a lot. Smart stuff, PDW, as usual. I'm not sure about durability but if I haven't updated my review, it means there were no issues.
Took a little bit of adjustment to get it properly snug so it didn't drift, but once adjusted correctly it barely moves. Does a good job keeping the mud off me. I'd buy it again.
I bought this for a rain road bike with wider tires (28 mm). It works fairly well to keep your shorts and jacket from getting wet and the streak. Easy to mount but the the flip down lock can be iffy. It fell off once. I put an elastic band across the indentations so that it cannot slip off. I understand that new Ass Saver design is to have the locking tab flip up. The new design might work better.