Here is my elaboration: I do like the look of a Doberman with a nice crop. That said, I understand that aftercare is as important to achieving a nice crop as is the surgery, and I am absolutely not up to the challenge of the aftercare. There is an excellent, highly regarded veterinarian who does beautiful crops and can provide aftercare as well - but she is located about 150 miles from me. To make a 300-mile trip weekly for several months is more than I can do.
If everything were equal (i.e., if I were within reasonable driving distance of a respected veterinarian who crops and posts ears or if I were near someone who could provide expert help on posting), then I might choose to have my puppy cropped. However, I believe that new owners should have the choice. Moreover, I would probably still choose to get my puppy from Kathy.
There is no reason that you have to keep returning to a cropping vet for posting. Surely, if you truly need help, there would be another breeder in your vicinity that could help you. It doesn't even have to be a Doberman breeder (or owner) although I'm sure that Kathy or we could find someone to help - it could be a Boxer person or a Great Dane person, for eg. It is very commonplace for breeders to try to find someone nearby to help a newbie with posting, if necessary.
Another thing is that, as a breeder, if the new owners are not close to me, when we meet beforehand and/or when they pick up the puppy, we did posting lessons on adult dogs just to show how it is done, and we would let the person try it out. It's nice to learn on an older dog who stays still. It's really not that difficult with some practice. Ask Kathy if it's something she could teach you.
As for Kathy, I've known her for a number of years (20ish). I have bred to one of her dogs, and stayed at her house for a week while doing so. She has also stayed at my house for a week for a breeding that didn't work out, darn it! I have no problem recommending her. The dogs have good temperaments, they are nice to be around (and to sleep with, from personal experience - lol), she doesn't only show them - she also does agility and therapy visits. She cares a great deal about health and longevity and shares a lot of the same philosophies that I have in those departments. She is not anti-cropping, as many like to believe. She simply believes in choice. Her own choice is to own uncropped Dobermans but in the past, she would make sure that her owners who wanted cropped puppies got nicely cropped puppies. I don't know if that has changed but I suspect not. However, I think she gets a pretty big clientelle that wants uncropped puppies since she is so rare in offering the choice (as a responsible/reputable) breeder.
The puppies I got from my litter sired by her male have been successful in barn hunt, obedience, agility, lure coursing, nose work, rally, temperament evals, etc. Conformation showing fell a little by the wayside, but one was a Best Puppy in Group winner, another was pointed but the owners ultimately chose to do other things. There have been a couple of health issues in the puppies but in no way do I blame her dog- stuff happens. We both tried our best to not have stuff happen. Above all, they are nice dogs, much loved pets. Two of them had children arrive in their families along the way, and they are marvelous with the kids. This gets kind of underscored because the one family has a 2nd Doberman that isn't so great with the kids so they certainly appreciate him for that.