I have owned these for two rain seasons, which here in portland is pretty much 9 months long. These fenders get a lot of use, and so far so good. The reason I bought these is unlike other "race fenders" these have adjustments on the fender supports. Some of the others are adjustable only by fidgeting the finders around where they mount leaving you hoping that they will clear every thing.
Once you've finished with the initial adjustment they are super quick and convenient to strap on and take off. The rear was a little long and rattled against my rear brake caliper so I cut about an inch off the end of it. They work amazing. It rained a lot more than usual this winter, so they were perfect for commuting. The best part is the convenience.
These are basic fenders to fit road bikes without fender eyelets. They are fairly easy to mount and stay in place during most road surfaces. They minimize the amount of road spray onto trout and anyone riding in your pavement, but the amount of debris splashed onto the bike is still substantial. But they're better than no protection. I wish they had slightly better coverage.
Fenders are installed for the winter and have saved me from road spray very effectively for such light and partial wheel coverage as these are. They have stayed in place very well.
These fit great on my daily ride. They go on and off very easy and the rubber binders work very well. I would recommend them to anyone who wants a quick attach fender for rainy day commutes.