These panniers have been on my commuter for about a month now, along with the LG R-16 topper. They fit my rack fine and are very stable. They have kept my clothes and lunch dry in light rain. This time of year when I need extra layers in the morning, but not in the evening, there is plenty of room to carry a jacket and anything else that needs to go home.
I would not recommend these for anyone wanting to carry more than commuter essentials or day excursions, they are not high capacity. I have failed to fill them to capacity on a commute, but I don't wear size 13 men's boots to work, either.