I have used a Carradice bag before. It was an attempt to use my road bike as a commuter, and the attempt failed. One problem was that the bag was too small for my gear. But most importantly, I am too small for the bag I bought, or at least, my bike is. I tried a Nitto bag uplift, but it still wouldn't clear the tire, because it wanted to hang under the seat and then sag toward the tire. The one you have pictured looks pretty rigid and it might not be an issue.

It was my fault, as I went for a slightly bigger size than recommended for my size bike. So, my only advice is, size it properly, especially if you aren't tall.

If you want the uplift, it's yours for a trip across town.