Could you please tell me what your reservations are, as this is one combination that I'm thinking of? Might use the Givi side stays.
Other thought is to use Givi's MT501 side cases on the Givi racks.
I think the SW Motech racks are really the only ones available for the bike that don't look over utilitiarian (or just plain ugly) when bags aren't attached.
As for the Kriegas, they use a pair of single straps (per bag) to both fasten themselves to the rack and to fully close the bag (to keep the top 'flap' in place).
These straps are anchored to the rear of the bag and must first be passed behind a rail on your rack (to prevent the bags from flapping around) and then underneath the bag, finally fastening to the hooks that dangle from the flap at the front.
There are several problems with this.
First, it's unnecessarily fiddly - every time you want to get into the bag, you need to unhook these straps from the hooks at the front, which requires 2 hands, whereas a simple buckle would only need 1.
Further, when the straps are unhooked, they simply fall away and down (as there is no keeper/loop on the bottom of the bag etc.), dangling close to the floor.
This is again a pain as you need to bend down to grab the straps when you want to close the bag up, and, should you be in a hurry or distracted and forget to fasten the straps (easily done, as they are out of sight and the bag will essentially looked fastened at a casual glance, since the flap falls in to its natural position) they will be dangerously close to moving parts!
Overall, some of the design choices for these bags are dreadful and really only suited to touring, where you may only need to get in to the bag a couple of times a day and can take more time and care with the fastening.
Considering these are marketed more as an every-day bag, for use with bikes including those in the more 'form over function' category, they really should have have made some different choices (like separate straps for attaching the racks and for closing the bag with buckles instead of the hooks).
Other minor quibbles are that the bag base is not rigid enough, so if carrying anything dense, the bags' bottom sag.
I have had to (non-permanantly) modify mine to make them more convenient to use (adding buckles, a plastic inner base and strong magnets to retain the straps when unfastened).
Quality of manufacture though is very good, as is the syle (at least when packed - they deflate rather when empty).
I believe that the MT501 bags would be more convenient to use but, imho, they just look wrong - way too feminine and 'refined' for the bike,
