I lived in Boston for 5 years. At my first job, about half of the 50 person staff recommended Doctor Foo! Even after changing locations all over the metro area, I stuck with Doctor Foo. She's the best! All the reviews can't bring her to life, you have to go for yourself!
Now, I live in California, but I still go back to Boston to see family and friends once or twice a year - every time, my ritual is to make sure my family will be around, then make sure I can get an appointment with Doctor Foo, and THEN I buy my plane tickets. She's really worth it, even though she's "out of network" for my dental plan, and not fully covered.
I've had my teeth murdered before by others, and just having Helen's professionalism and talent would be enough to make me want to stick with her - but on top of it all, she's the nicest person* I think I've ever met, and she's fluent in "five metal gadgets stuck in your mouth"-ese, so don't worry about her not noticing when you're in pain or in need of a rinse.
A visit to Doctor Foo is like giving your teeth a trip to the tooth-spa, and your inner child a much-needed cookie. May her jar never run low!