I don't - but there is a HUGE difference twixt paying out for a lid which supposedly protects your brain and hearing better, and paying out for a set of luggage that WILL get scratched and messed about. And comments recently regarding quality (or lack thereof) are rife. Corbins (as a customer, I'm sorry to say) are living off an an old reputation.
You are paying for looks, and to some extent exclusivity. That in itself is a reason that is personal. Other hand laid fibreglass luggage costs a third the price, but again aesthetics come into play.
As far as I'm concerned I go for FUNCTION before form. For the price of Beetles I can have 8 sets of Shad (who make the OEM Beemer panniers). They're repairable as you can buy spares. Sure they're ABS - but by the time it cracks - it's probable that I'll either have a different bike OR I simply buy another set - and I'm still in pocket.
Will a beetle take a full face lid? - NO. So it's not even on my list.