I have them on my MTB and think they are only OK. The front is straight and true but the back has needed trueing 3 times, and has had 1 broken spoke. I weight 150lbs and am not doing any 'extreme' riding. The upside is that they are dirt cheep, but for my next set of rims I'll be getting some Mavic 717's.

That said, I'd bet they would stand up quite well on a touring bike. If you weight a bit more I'd consider a Rhyno Lite on the back though.