In my humble opinion, Oxyclean Free works better than PBW at what I want it to do, and that is to soften/dissolve kraeusen. I don't get mineral scale on my equipment, so I don't have to worry about that aspect.
Be careful with generic or home-made PBW clones, and always pre-mix with water instead of adding the powder to the vessel to be cleaned... I bought some from a popular online homebrew shops once just to have it eat through two Better Bottles.
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Planned: sLambic II, Flanders Red II
Primary: Fat Man Porter, Orange Blossom Mead, sLambic I
Secondary: Flanders Red I
Kegged: 3 different ciders, Janet's Brown, Barrel-aged Stout, Hallertau Blanc Pale Ale
Bottled: Flanders Red I