We try to avoid reshoots by ensuring that we have good creative direction from all of our clients before we begin work, but if we discover that we've made a mistake interpreting your direction (if we photograph a product backwards / upside down / inside out), then we will gladly reshoot your product according to your specification at no charge to you. Along with our apologies, of course!
On the other hand, if you decide after viewing your photos that you'd like to have a different angle, prop, or other creative change that wasn't previously discussed, then we would charge you a reduced rate for additional photos.