My experience comes from working with my dad's cat with Dr. Brianna Rooney.
Dr. Rooney was our vet the entire time and she was very professional throughout the entire series of visits. It began when the cat, Vivi, got very thin and refused to eat. Initial diagnoses showed nothing, but they put in a feeding tube so that she didn't starve. Further diagnosis showed lymphoma in the stomach lining, which we began treating immediately. Unfortunately, the cancer was too far gone and spread to her brain. After having seizures and severe decline, we had to put her down. Despite an unfortunate result, Dr. Rooney did everything in her power to help her.
Overall, I recommend them as a clinic for those in the Phoenix area. The vets are very professional and good to work with.