i think most people view them as inferior sounding to the WH1/2 and to the WH4 etc, the only cool thing i like about them is that they can setup with the software of all the other pedals in that series, and you can reboot it to each different one, so millions of settings.
if you're looking for a really versatile monophonic pitch shifter, i've found the line6 M5 (with external expresion) pedal to be the best for my needs (and very good value for money), you can dial in whatever shift settings you want, including the bass whammy setting that everyone goes gaga for!