I have a Toxic, Blue Vibe, Black Widow and TNV. All have under 100 games. I haven't noticed a loss in reaction, but hitting power isn't the same with my Hammers.
My TNV and BW have been great so far, but they have under 50 games on them, because they are too strong for the THS I bowl on.
I own a ball spinner and use clean & dull and storm cleaning products after every set. My Toxic used to destroy racks...Now plaque, plaque, plaque!
Maye it's mental, but I'm ready to try some other brands...