I use this and due to a glitch at Amazon, I got it for free! I electric unicycle to work each day with it on my back, it also carries my work stuff, and then I go to the gym afterwards. Today, it has 10 clubs and 10 balls (met up with a friend to pass) and 7 rings and one headbouncing ball, plus my computer/headphones.

Only complaint I have is that it only has one compartment so my computer can take a bit of a beating in there.