Did three root canals for me. Very professional, completed the work quickly and effectively. Very little discomfort, reflecting both his skill and ability to deliver effective anesthetic. My work was fairly complicated, he made every effort to work around old crowns, etc. Root canal on one difficult molar failed within three months and tooth was extracted. I acknowledged that this was not his fault but asked for some financial relief. Demonstrating integrity and sensitivity to his patients, he complied, making a significant billing adjustment. Also provided excellent referrals to other dental specialists to continue my treatment. Bustamante is a competent endodontist who communicates well and works hard to meet patient needs. Very glad to recommend him.