I shot a model shoot like American Beauty with a model on a bed of roses using these petals. I also used a dozen real roses with petals ripped off. There is a very slight difference in the color gradation of the real petals that is not on there, but unless someone is looking for it, they will most likely not be abel to tell the difference.
I will say that 1000 petals is not that much. If you want to cover an area so you can not see through the petals you will need 1000 petals for every 2x2ft area. For a bed figure 10,000 petals to fully cover it.