Has anyone seen/used the portable folding bike?

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I saw a portable folding bike advertised somewhere. It was really lightweight, so it would be perfect for people who are "strength-challenged" (lol) and it would be very portable, since it can theoretically fit almost anywhere. I want to get one of those, but I wonder if it really works well, both as a bike and in terms of the portability. Because if it is troublesome to fold up or if it's not a strong bike, then I wouldn't want to have one, but if it's really as good as they say it is, then it would be great to have one, because I could bike almost anywhere and then load it up in someone's car trunk if I need to, or whatever and that would be really cool! I could forget about bulky bike racks or installing any such, or the lack of them on most public transportation.