We visited Yuan on a Friday for their Yum Cha Dim Sum, it is all you can eat (not buffet style) for such a good price. I would highly recommend you give it a try for yourselves.
The meal was wonderful as a whole, not only because the food was delicious but the staff make it such a pleasurable experience. The young lady who served us was so knowledgeable and so helpful. She made some recommendations of what to try, and every dish was delicious.