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That system is tougher than the ortlieb one, you cant beat metal hooks and a bungee aside from the Arkel system which is a metal rail as opposed to plastic. From what I've been told doing research for my range, plastic rail systems (most common these days) break, the old metal hook and bungee doesnt but the fit isn't as good.
jtrent90-
I always favour the old metal and bungee system, they're extraordinary simple and easy to fix with anything you can find on the roadside, they're also a lots more secure as the elastic prevent the panniers from bouncing, which is usually what cause wear and tear in the long term.
Modern system are a little more convenience but required special part (shim to ensure the Ortlieb fit snugly) to make the most of it, and even when you set it up well, it's hard to make it 100% rattle free.
edscoble
My reservations are in the fastenings, which are robust but a bit old-fashioned in that they use an elastic hook at the bottom. A lot of detail in this review.
Don't mind the elastic, except:
Just checked this on the Soma, 20cm. Maybe you could modify the hook or something. I dunno, but they look a good alternative.