I *just* got some Ortlieb Back Rollers (as in they arrived yesterday afternoon), so I can't officially promote 'em yet. ;-) But they do seem to be the most common model here in the Pacific Northwest. I see a lot of people using them here in Olympia, and if they aren't truly waterproof, they wouldn't make it here! And they come in nice colors. I was super tempted by the bright yellow, but decided the red goes better with my bike. I'm so vain...

The attachment system appears to be solid, though I'm still figuring out the little hook at the bottom... And though you do have to roll the top, it's pretty quick, and I like the fact that if I ever get the sudden urge to do a grocery run with 'em, I can always leave them unrolled and open...they'd hold gargantuan amounts that way. That isn't an option with the Packers (the other style of Ortlieb panniers, which might be a bit easier to access on the fly, I dunno).

I'm planning to run some errands later - get dirty clothes from work, check the bike shop for the new county map which apparently has been out for a few months without my knowing it , and check out a portion of one of our newer trails. Some of the way is pretty bumpy, so I'll have the chance to see how these things stay on! Hopefully I have 'em attached right...