Well today was my first commute with the pannier. It was definately more comfortable (althouhg I still had a pack to carry my lunch and hydration.) My back feels way better (and so does my butt.) A couple questions:

Even with the pannier all the way back against my rack, I am getting healstrike unless I bike pigeon toed. Can I move the rack pack further or is that just how I am supposed to bike?

With one Pannier with my 12lb computer in it I was walking the bike holding the handle and the bike tried to flip over on me- is this typical?

Anyway big +1 on the panniers. My speed was about the same, but the ride was much more enjoyable.