I used an Oxford bag that gave me a little more room for trips. It had a bottom strap that went under the rack and then a used 2 bungee cords over the bag. It still had a tendency to lean one way or the other in an all-day run. This was exacerbated by me using it as a backrest.
The rack improves the look of the bike with a solo seat and seat rail. It is also useful to bungee cord small 6 pack size parcels to the bike so you do not wear a backpack like a kid going to school.
