OK, I see one review for Mandarina Studio here, and it's pretty stellar. Let me second that, and…read moreadd a few more things.
I retained their service when my partner and I bought a house in Brookline about a year ago. We decided that we basically get rid of all the stuff we had at that point and do the whole house based on a new concept, which we weren't sure about at that point. Plus, we are super busy people, professionally, so we couldn't spare lots of time on this project and so needed someone who was cool and dependable.
And here (after we interviewed a few potential candidates) comes Amanda Reid, the principal of this design firm. She was something! First of all, she has such cool, sophisticated taste on everything we need advice on: furniture, wall color, redoing the whole kitchen and bathroom etc. We were originally into the super modern, kind of cold look, but she persuaded us to introduce some eclectic elements like antique pieces into the whole mix, and the resulting space is just unique, tasteful, and functional. Whenever we throw a home party, people who visit our house for the first time usually gasp entering the door. And we tell them we did everything by ourselves (just joking: we give the studio full credit gracefully and gratefully always).
There are so many other things I can say, but this is already getting too long. Just a few more things. Amanda is super organized and a crystal clear communicator. Over the course of three-four months, she probably made hundreds, possibly thousands of decisions, small and big. She always presented in her inimitable perfectly clear way what our options were and executed everything in her effortless manner (her presentation skills are something to behold). At work, I interact with some of the smartest people in the world, but rarely have I witnessed such efficiency and transparency in communication. We wanted no headache, no pain, no drama because we are so busy, and Amanda definitely made our life easy.
Anyway, to sum up, if you live in this area and have some big complex project, go with her. You wont' regret.