I just recently bought a Kawi bag for my GenII, so far so good. The mounting is easy and secure. It's easy to flip up to fill the tank but I haven't really loaded it down with gear yet.
The space for the GPS/phone/map under the window is kinda an odd size, IMO. My garmin doesn't fit and its too big for the phone (I have to fill the extra space with a towel when I put my phone in it).
2011 Versys 650
Even a fool is thought wise if he keeps silent... Proverbs 17:28