I'm a fan of them but I wouldn't put them on a road bike since they are not designed for them. Crushing chain stays is an issue.
They are very practical though. And I do not understand why some people would ride a road bike as a daily commuter if practical items like kickstands, locks, racks and fenders are not an option on those bikes.
As for those complaining about weight, we all know most cyclists stand to lose more weight on the person riding the bike than the bike itself.
