aubreybobb,
To put the Critical Mass break in in perspective... I added one set under my Carver tube mono blocks. And then about a month later I added another set under the second mono block.
When I added the second set I noticed that the soundstage image moved in the direction of the Critical Mass footers from the original placement.
Sure enough, about a couple weeks later the left channel started to come into its own and the soundstage became complete.
These footers do have a strange break in.
I'm not sure if all conditioners benefit from after market footers, but my guess would be they do, I suppose it really depends on the power conditioner and the footers.
But for all you tweakers out there, it's worth a try.
ozzy