About the Two Wheel Gear bag:
Originally Posted by bikeutah
Does your laptop and files fit snuggly or do they have a tendency to move around?
My laptop fits quite snugly; the pockets seem to be designed for the average laptop. Mine is a widescreen, so I have to cram it in to fit side-to-side, but it has plenty of room up-and-down. I'd still suggest some sort of padded case for it, just to be safe (I just have a lightly padded envelope my wife sewed, and no problems).
The side pockets are pretty narrow: unless you have tiny feet, your shoes won't fit there and have to ride in the main pocket (where they go really well at the bottom). The pockets are about perfect for standard manila folder-sized parcels, but you can fit legal folders in as well. There's also a handy tool pocket on the top, as well as a shoulder strap for when it's off the bike (I wouldn't have believed how useful that is).
The attachment system is pretty straightforward, it has standard clips, and then d-rings that grab the hooks on the bottom of the rack, and are tightened with velcro straps. Quick and easy to get off, not quite as easy as a bungie, but much more secure.