I've been using them to and from work since I got them and took a short ride with the wife yesterday. Yesterday's ride was only about 150 miles, about 15 on gravel with some patches moderate wash-boarding. So far, so good.
The space has been more than adequate so far. We've got a longer distance camping trip planned for a couple weeks from now that will require more stuff so we'll see how that goes.
I haven't dropped the bike or done hundreds of miles on rough gravel with them, yet, but the rack and case hardware were all tight when I checked them after getting back from the trip yesterday.
That is, no complaints so far.