The best bike bar bags all follow the same sort of formula. A barrel-shaped bag, sometimes another shape, but usually attached to the bars by a pair of straps. Most of the time this formula works well, but it creates some challenges.
If you run an out-front computer mount then it can interfere with access to the bag, and if you run anything slung beneath the computer this only compounds the problem. If you run lights mounted to your bars then you have to navigate the straps, which can often be a pain. Finally, if you ride on the tops a lot, having the bar bag sit right against the bars can leave your fingers with nowhere to go.
