I have these bags. I've only had them out in a light rain and they worked well. As for mounting, the clips are decent, but I've broken three of them. Seattle Sports customer service has been great about sending me replacements. They definately get my thumbs up for supporting their product. I use these bags regularly (~2500 miles/yr) with moderate weight (5-10 lbs/bag). I have two panniers and the bag that goes on top of the rack. All around, it's a decent set of bags.