Even into November, the roses are doing well. As a matter of fact, I think they look better now, after the Japanese Beetle damage from this summer has been pruned away.
The cold temperatures seem to affect the color saturation, making the blooms appear more vivid. This rose seems to glow from within! Still, I wanted red, not pink, but I don't know another shrub that will do this in front of the foundation planting of boxwood/yew evergreens.
Even with the negatives of thorns, Japanese beetles, and the trend of being overplanted, I will keep the KnockOuts.
Even in November, when little else is flowering...