This little contraption is actually quite nice, I think it's a we bit above 'snake oil', and regardless of what it is or is supposed to be, it's something that I can just slap on a vocal track with minimal fuss and it just makes it sound better, admittedly I can make my vocals sound better just by hitting the mute button . . . but I like what ever it is that this does. I only have dirty old Shure SM58's and 57's, probably should splash out and try other better mic's, but I have never really got the urge.
Another benefit I got from using this is that I revisited some other T Racks stuff, and made myself a nice little vocal chain which works quite well, and different from my usual, and man isn't that Valhalla Plate reverb something else, first chance I've really had to have a good play around with it, really nice.
All in all a thumbs up to this little piece of gear, very nice, and a good price to boot.