Wiljer blue devil

Has anyone ever tried the wiljer blue devil sleeve cover?
it looks like it may add a good bit of scrubbing power, and perhaps cut down on sleeve wear. anyone?:confused:

I have not to date, but enjoy the scrubbing power of Ettore’s Porcupine and Pulex’s MicroTiger sleeves.

I have used and, in fact, still use the micro tiger. love it, but it doesnt quite seem to break severe fingerprints as well as I would like(such as restaurant interiors). I also own something similar to the porcupine, m
havent tried it yet, though. perhaps my soap? I use 1/4 oz. of gg3, 1/2 cup of vinegar per gallon of water.