I am an ex-
BOB Ibex user (happy one btw) but for future tours I have gone with an
Extrawheel Voyager as it suits my needs better.
I have good experiences with my BoB Ibex but I never loaded it up beyond what I could get into the bag with maybe some shoes or the like hanging off the outside.
BoB Ibex in action on the Munda Biddi Trail
Regards
Andrew