I have the Shorty Forty and use it to fill the gap between my 24mm f1.4L and 50mm f1.2L. I like it a lot and it works perfectly for what I want. For $200? It's a no brainer. Almost every photographer (especially those of us on full frame bodies) can use this lens. If you use primes, it sits in a very nice spot between 24-28mm lenses and the 50s. (It might not be as attractive for peeps who have a 35). If you use zooms, it's a much smaller, lighter lens for carrying around. And then we get back to the $200 part of the equation. It is, hands down, the best $200 lens on the market.
From a magazine editor's standpoint, this is pretty blah with uninspiring images. Very little useful information.
Roger, at LensRentals said all that needs to be said in four sentences:
"This is really an amazing lens. Little pancakes are cute and all, but usually aren’t of very good image quality. This one has exceptional image quality and does it at an amazing price. Probably the best bargain of a prime lens that exists, anywhere, for anything."