Over the last days I tried several of the Yum cha (dim sum) places in Boston, and I was most impressed with Hei La Moon. Specifically, I found it to be a whole magnitude better than Winsor.
To give you some perspective I like yum cha a lot, and make an effort to try out places every time I am in Hong Kong, so I think I am quite qualified to evaluate that type of food.
Of course Hei La Moon is not as good as the better places in Hong Kong, and was Hei La Moon in Hong Kong I would probably rate it as slightly below 3 stars. But this is not Hong Kong and way too often Yum cha is made terribly wrong in the west. Fortunately, these guys do a pretty good job with all the basics such as har gow, siumai, foong jow which is also indicated by the very large number of Chinese guests.
As a side note, I was sitting at their upper floor which seemed more busy and nice. Next time I'm in Boston and in need of a good Yum Cha fix I will definitely go.
Hei La Moon
88 Beach St, Boston, MA 02111