I used ventura on my CB1300 and it was really good apart from it leaking, the zip breaking and all the colour bleaching out..........
Actually, it was shite but its all subjective.
Pleased the BMW stuff sounds good, not that I will be buying it - I`m likely to use those Ortleib throwover bags which look really good and I suspect very waterproof
Ventura looks good on a 'racier' bike such as the XR (imho). I used it on my Suzuki GSXR when I went down to Rome. It can leak thru the zips, so sticking your gear in bin bags and/or using the storm cover are advisable esp if you're hitting torrential rain, which often happens on the continent.