Frankly, neither the "classic neuman/neve" or the slate setup sounded very good to me. Of course, that could just be Steven's screechy, warbling yowl. Looks to be for the "pros". Who would already have a decent locker and pres.
It's getting to where I have a really hard time actually hearing any "improvement" in much of the newer plugs coming out. A combination of my old ears and the teency bit of improvement (if any) the plugs offer.