I gave my DH one of these for Christmas. It works perfectly on his bike, very easy to manuver and not heavy...and relatively easy to install. However.....
On MY bike, there is a problem with it hitting the rear rack, or if you have a trunk bag (which I like to have with me) it hits up against it when you turn. We ended up buying an extension, which sort of helps, but still not ideal. Oh, but if you have the extender on your seat post you can't use your trunk bag, even though it will clear the rack.
He has a rack and bag on his bike, but because his seat post is higher it is a non issue on his bike. So unfair, as I would like to use it for grocery/errands.
If you don't have a rear rack, there wouldn't be a problem, or if you don't mind removing your rack when you want to use it. For me, it seems like too much of a hassle. I still might try it with the extension sometime for a short trip to see how it feels on my Jamis Aurora, but I was dissapointed that it wasn't better suited to my bicycle because it's smaller.
We initially wanted it to try for light touring sometime, but haven't had a chance to use it for that yet.
"Fast or slow, when I ride, the troubles I started out with can't catch up with me."