The white side does a lot and can easily fill raccoon eyes or an underlit face, but you need to hold it very close, right off frame, because it's not very big. For a tight head shot it's okay, too small to help with group shots. If the ground isn't in frame, you can have your talent stand on a white bed sheet. If you need a big reflector, buy some bead board at Home Depot ($10) or a grip shop ($30). The gold side is very harsh and nice for a side light or sunset effect, not a naturalistic fill. Silver side is better for that but still harsh, rally hard to stare into and you'll see shadows. Fill flash might be your best option for wider shots, a bed sheet under the talent positioned smartly can do wonders, too.