Levinson 380S and PS Audio PP

Anyone out there using a Levinson 380S that has tried a PS Audio PowerPlant? Did you find it benificial or just different? I am trying to find some feedback before shelling out shipping for an audition. Thanks for any input.
John Atkinson (Editor of STEREOPHILE) tried the PP with his 380S, and claimed it narrowed the gap between it and the Ref 32. See the Power Plant review in Stereophile (or maybe it was the followup on the multiwave mod...not sure.)

Myself, I've been using a P300 for six months, and am delighted. My wife, who's not an audiophile, noticed the same differences I did.