Been there a few times now and though it’s not cheap the portions are generous and the taste according to my liking, well, actually one of the best food I had so far in Taipei.
Try the steamed fish in Chinese herbs, the eggplant vegies or pork ribs - yummy. Not a Tofu friend but I eat it there, too (if others order).
Drinks are a rather expensive affair (Coke NT$100), so a dinner for two can easily cost you 150 dollars or more but once in a while I like to go there.