Oh, bummer. When I walked past it the other day they were in the process of pulling out the product and shelves. I was hoping that meant they were remodeling, not closing.
I agree with the previous poster: Both Wellman's and Willie's have (or had) very similar inventory, including quite a few things you still can't find at Carrefour, Jason's, City's Super, or anywhere else in Tianmu as far as I know. And actually, on many of the items that Carrefour does carry, Wellman's had slightly better prices. I wouldn't have called them overpriced at all for imported western groceries in Taiwan.