I really recommend Doctor Hart for cosmetic dental work. A friend of mine had referred him to me and I was really glad she did. I had my teeth straightened with Invisalign and I have an attractive straight smile now. It took a year of braces but was well worth the wait. I really liked the customer service there too. They really tried to work with my schedule. I am a student and don't have a car, so I found the location really convenient, being right across the Copley train station. The hours are convenient too, with evening and Saturday appointments. I highly recommend this place.