Had high hopes for this bag, but been very disappointed...

After spending a LOT of time researching, looking for a bag for my cycle commute, I landed on this with waterproofing, capacity, laptop sleeve, side pockets, and outside compartment for helmet all looking like they ticked most of my boxes (foregoing my preference for waist-strap for the other features).

Unfortunately, it didn't take long to learn that this bag wouldn't make the grade. With any notable weight the bag is completely unstable, no matter the shoulder or chest strap configuration, it's not going to perform like a bag with waist straps. It moves around a lot, on or off bike. On bike, standing, it bounces along and shifts side to side - far from efficient for your ride! Off bike, I usually have a bit of extra weight and this was worse - the only chance to secure the bag is to tighten shoulder straps to the point of loss of circulation. When one arm was trailing to pull a checked bag behind me, the bag slips from the shoulder leaving you off balance (I am over 185 with large shoulders...)

The outside straps are non-elastic, and don't hold anything in place - unless huge, at which point you must loose straps to insert, then tighten again. All straps have a needlessly excessive spare length, meaning they are often caught and pulled by mistake.

The strap under the clip securing the top seems a natural grip for moving /handling the bag as you might, however all straps seem not to fix securely at their set length…