“Due to the shape and size of the bag, there not much you can fit in there, probs about as much as stuffing all the pockets of a jacket. The magnets are strong but each magnet is loose in. It's own quadrant of the bag, training the point of anchor may be different for each quadrant to you really have to ensure it's secure. My phone is also on the larger side and doesn't fit into the window pocket so I. Stil need a phone mount on the bars which is at risk of gutting the bag when in situ. Waterproofing if great. Still convenient for a little extra luggage.”