Well, it worked in Japan. There was a big push/transition from hucard to CD and NEC replaced the Duo as THEE replacement/main system for the PC-Engine. The CD addon was released at $400 in the US (some stores had it for $350), it quickly dropped to $350 and then $300. It was the lack of software that really hurt it. The SegaCD in the US sold something like 2million units total. That's pretty damn good for a pricey addon with very few must have titles. The CD addon unit for the US TG16 might look kind of funny/odd now, but back then (because I had one) - the tech made it the coolest thing ever. I never had one friend that made statements about it being odd or funny looking. It was more like "wow, CD games! Badass!".