I gave this a ten; it had something that I generally didn't like (the use of the color to force the viewer to look at a part of the image they might otherwise miss), but the real impact of that use was to force us to juxtapose that with the woman in a way we otherwise would not have. I love the starkness of the B&W, and the composition is spot on. I even liked the darker red in the reflection. Perfect, in my book, though probably way too out of the box for DPC.
I had to come back to this photo because it is such a potent image. I'm not on board with your choice of color because it just seems so unrelated to the woman. I would rather this were all B&W, but since this is a selective desat challenge, something has to be in color, right? I think her bags or even her in color might have been a better choice, but that might come off as cheesy.
I originally voted this image a 5 with the intent to revisit it when I finished with the others. I'm not going to let the red sign be a speed bump in this image. It is just too good of a shot to have a "5," but for the challenge, the red sign does detract from the overall in my book. I'm bumping my vote to an 8.