"At my place of work, QR codes work.
We have limited goals for them, and they suffice. And we're not alone. There's a wiki page devoted to using QR codes in library settings, mentioning what works, and what does.
Our most popular library blog post achieved that distinction almost solely because I papered the campus with these flyers on January 17th, 2012. There were 80 views via the QR coded embedded on the flyer, far more than the results for the traditional way of viewing the blog, via a browser and mouse click. All that in 48 hours, on a campus with a full-time enrollment of 2400 students. In part, this is a function of our user population. Many, if not most, do not own a computer, or have internet access, but many, if not most, own a smartphone. In sum, we know our audience and we have limited aims for how we use QR codes."