Some would say that they've diluted the brand by focusing at least their lower-end models to the home theater crowd (the Eggs, for example).
In addition, I get the sense that the Uni-Q concept was originally perceived as a bit of a gimick and backed up by mediocre reviews of the original implementations. However, their latest upper-end models (XQ and Ref lines) have been getting some good press.
Finally, as Aball has pointed out, Kef seems to have largely ignored the US market to focus on Europe.
In addition, I get the sense that the Uni-Q concept was originally perceived as a bit of a gimick and backed up by mediocre reviews of the original implementations. However, their latest upper-end models (XQ and Ref lines) have been getting some good press.
Finally, as Aball has pointed out, Kef seems to have largely ignored the US market to focus on Europe.