Masters Auto Service in Mill Valley is by far the BEST auto repair shop I've ever used. As a woman who knows very little about auto mechanics, I trust them 100% on all their advice and repairs. They're reliable, honest, and friendly. They will take the time to professionally and thoroughly explain to you what needs to be done immediately and what can wait. This is extremely important to me. As long as they're in business, I will never go elsewhere. They make you feel like "family." For me, integrity is the most important aspect of any business, especially auto repair. And I don't mind paying more for that kind of "rare" service these days.