A bit longer review...
Done some Ks with them now, mostly gravel and I can tell more about them.
Waterproofness: they are completely waterproof after hours of riding in the pouring rain. Water didn't get in even when washing with pressure-washer.
Integrity and bombproofness: have done offroad, with some slow and medium speed falls - the corner cutout does the job, just some scratches and dents, unlike ZEGAS that my mate got twisted on fall (the "Achilles heel" corner of the square shaped boxes). Also bike has ticked over couple of times from sidestand onto the tarmac and panniers aren't affected or bent.
No mounting bit or bolt hasn't loosened up or broken on carrying more than 10kg of stuff on each panniers over Estonian potholed and corrugated smaller tar and dirt roads.
Finish: the anodizing quality is absolute top noch compared to the ZEGAs for example that already have it peeling off and corroding on damaged spots, and mate of mine is amazed that after this abuse mine are still mint! So don't be fooled by "anodizing" many manufacturers advertize, it can be seriously crap (just a thin almost non-existant layer on Zegas for example), also painting or varnishing is mostly short-term solution. So IMHO a good quality anodizing is the way to go for long term usage w/o annoying aluminium corrodation inside the panniers making your stuff silver-dirty, your food poisonous or outside the pannier looking old and collecting dirt.
Capacity: haven't calculated precicely but they are more than 40L each. Roughly calculating the r/h side is around 48-50 liters and l/h exhaust-cutout side is around 45 liters. And with that relatively huge volume the width of the bike is down less than a metre - 97.5cm to be precise.
Aerodynamics: fuel consumption has stayed the same. I do around 100-120kph on gravel, which is optimum speed for my GS. While my previous boxes did around +0.1 to +0.3L per 100km fuel consumption rise with those speeds. With Worldbeaters there's no apparent difference whether the boxes are on or off - Vern's wind tunnel tests obviously start to pay off(?) I'll let you know the autobahn tests when I ('m forced to) get there...
Pillon comfort - no restrictions for legs or comfort limits - Kariina rather likes them and feels more secure. Fixing some softer stuff on the panniers will make them nice comfty hand-supports which makes the rear seat rather desirable place to be.
The only minor (actually my own) con I've found so far: although I already have 4 tie-downs on each pannier I maybe should have ordered additional ones in the middle, since I often place my tripod on the pannier for short photo-trips out in the weekends and I'm lazy enough to tie it with 2 ties as a lazy bugger. But then again with 2 tie downs fixed it's more scure and my £££ tripod won't fly away when the one belt decides to broke. So maybe I better get used to fixing it with 2 belts

Anyways I'd recommend geting decent 4 tiedowns on each pannier. You can put loads of stuff on the pannier whether for very long trips or for just silly-shaped things to transport that are too long to put in the pannier or you can just use soft stuff in waterproof rolls on the panniers for additional comfort for your pillon.
Shortly:
love 'em!
Does my bum look big through wide-ange lens?
Actually they're less than 1 metre wide
Front.
The exhaust cutout side of the pannier. Fits me nice sounding Leo-Vince ALU exhaust very nicely, and enhances the all-silver looks
With rider (erm... pillon) placed on the bike, just for the perspective.
Cheers, Margus
