I got my new Axiom panniers in the mail yesterday. Super sweet. I hooked them up and took them to the grocery store on my commute home.
They gobbled up all this stuff:

I would say that my rig was about 33% full. There is one problem though.
My rack does not have the proper rear cage to keep the heavy panniers from
hitting my moving spokes on big bumps. I have to mount the panniers all the way back to clear my size 13 shoes. Ask me how I know. My heels hit the bags all the way home and when I got home I hit a bump and thought on of the bags fell off with all the racket that was happening behind me. I read a lot of stories about panniers falling off on the Bike forums.

I have one like this:

I need one like this with a horizontal bar after the
lower mount to keep the pannier bags out of the spokes.

I called Cycle Path yesterday to see if they will
trade mine in. They said to bring it in and we will talk.
Cross your fingers.

Here is the back of my rig with a camera flash: It should light up nicely at night.