I never had to doubt their qualifications. They made their credentials completely obvious, which made me feel a lot safer. They made the extra effort to make sure every question and concern I had was addressed. I've already told my friends and family about the fantastic experience I had with Douglas Holtzinger, D.C.. They are so kind and caring, and they stay open way past their closing time to help anyone who needs them. They wouldn't deny anyone that needed help. I know I can always count on them. They didn't pressure me to buy anything I didn't need.