Yeah, it recently opened like a year or two ago in Täby. I've never been to dollar store, but Ica is basically just a normal supermarket, so I can see how Costco distinguishes itself in that market.

Täby isn't really a nice place to visit if you don't have a car, though. The bike paths are shit, and I've had dickheads in American trucks rev their engines at me when I bike through there. I'd be better of going to Martin och Servera than Costco if I wanted to buy in bulk.