Would it be a good idea to get a rec letter from my retail supervisor? He's known me for over 3 years, can speak to my work ethic and skills (maybe not directly on clinical skills, but I was a great tech/intern and would catch small details and things like that), and would say good things about me. A lot of programs say to or prefer to get letters from preceptors and faculty, and I don't wanna blow my chances either. What are your thoughts? Thanks!