I use the bag quite a bit on another bike and just generally. I really like it, fairly secure on the rack although I've not tried it loaded up to the max. Roll top means it can hold quite a lot of stuff and still pack down to be as small as possible. The lower half is reenforced slightly and holds its shape well so getting stuff out isn't a mission. Find it quite useful in the car too.
I use the bag quite a bit on another bike and just generally. I really like it, fairly secure on the rack although I've not tried it loaded up to the max. Roll top means it can hold quite a lot of stuff and still pack down to be as small as possible. The lower half is reenforced slightly and holds its shape well so getting stuff out isn't a mission. Find it quite useful in the car too.