Do you have facts to back up your info, or is it a 'feeling' as to why the vet is bad?
I know, that sounds like a loaded question, but it isn't.
The first vet I saw where I take the dogs was a good vet, I just didn't like her. She was too clinical, didn't want to relate to me or my dog, she seemed to want to 'treat and street'. The second vet (same practice) listened to what I had to say, discussed things with me and made me feel very comfortable. I recommend the second to people even though the first was just as compitent clinically.
You should definately tell her no matter what.
Inside me is a thin woman trying to get out. I usually shut the bitch up with a martini.