Four stars because mom likes it. After going to Szechuan Express across the street for a few weeks, she decided to give Taiwan Cafe a try.
Mom (from Taipei) says its more authentically Taiwanese cooking (had the Taiwan pork mei fun) than Szechuan Express and worth the price premium and smaller quantity. Personally I am not quite so picky and would choose Szechuan Express to save roughly a buck a dish, larger quanity, and faster service.