I went to Dr. Lum as a new patient 6 months ago. I have to preface this review by saying that I have an extremely high tolerance to pain and have NEVER been afraid of going to the Dentist. I have had multiple surgeries so my opening point is that I am not a wimp. My experience with Dr Karl Lum was the WORST. Where I never had a fear of going to the Dentist, I do now. He has NO bedside manner. He does not care if he hurts his patients. He even has the nerve to get mad if you complain. I had multiple procedures and every time I went in there it was the most stressful and painful experience EVER. He is HORRIBLE at giving shots. You feel every single one of them. It is pretty bad when I have a root canal with Dr. Cliff and it was a piece of cake. It was so easy and so painless. Then I go back upstairs to Dr. Lum and it is like being in a torture chamber with much less painful procedures than the root canal. It is pretty bad when I would rather have 15 root canals than ever go back to Dr. Lum for ANYTHING. The final straw was my deep cleaning. His shots were unbelievably painful as usual. He was so RUDE that I never went back. I am sitting with half of a deep cleaning and I don't even care.