This is a very well constructed Givi product, as with all previous Givi products i've had this is built to last, it feels very robust, the base is solid and zips are strong. What i didn't realize is inside the main compartment is a string drawn internal silver pouch (picture added) and the water proof outer cover are also stored here taking up a small amount of the room available and making packing a little more fiddly than anticipated mainly due to the drawer strings snagging on the silver material when tightening. The side pockets are suitable for debit cards, keys and passports. I don't feel the expansion really adds much but if you are struggling to get the main compartment zips closed then unzipping the expansion will sort you out. I fitted this to a 2010 Street Triple and had to move the tanklock to the furthest forward position (nearest the main grab handle) as the filler cap on this bike is close to the riding position. This is a simple 4 screw process and took 2 minutes to achieve. When riding It does not impede me in any way and actually provides some support.