I contacted them and asked if I could just get the rear rectangles, since I don't want to cover the paint nor top. They said yes and I am waiting for more info to come tomorrow. So far, having a very positive experience.
Sorry, I forgot to follow up on my posting!
Took quite a while to get the rear decals, but they came. I cleaned the back of the bags with alcohol and the decals were easy to apply and both applied without bubbles. It has been a while now, and I forget they are on there because they blend well.
The angle of reflection is very narrow. This means to get reflected light, the light source and the person's eyes have to be rather close together. And this is distance-dependent. So when a vehicle closer to the bike (like 10 to 30 feet) the angle light source and the drivers eyes is large and there is little to no reflection. The further back the vehicle is, the more light is reflected back. This might seem counter-intuitive to people testing the effectiveness of the decals, but that is how it works!
It is another inexpensive and easy safety mod that I do recommend.