Go to http://www.Dobermantalk.com
to see the discussions about this kennel. Use the search function at the top of the forum or ask about Kimbertal and someone will post some of the discussions about the breeder.
In my opinion breeders that have a paypal or credit card options on their websites are usually breeding way too many litters and are not breeding in the best interests of the doberman pinscher breed overall. In my opinion these large scale breeders are in it strickly for the money and don't seem to care much about what happens to the puppies.
You also might check the PA rescues in Kimbertal's area to see how many dogs they end up with that Kimbertal doesn't take back when the owners can't keep them for various reasons.