Not quite sure what effect if any this item has on the performance of my car, but as a good deal came along I took advantage of it and picked up a few bottles of Techron Complete Fuel System Cleaner. ($2 bux after all the discounts and rebates, per bottle).
Not sure if anything improved, but happy nothing became worse.
Would I recommend it?
Not sure, considering most Top Tier fuel has some variation of it’s own version of “magic” detergents… like Invigorate from BP or Synergy from ExxonMobil. According to the forums using a bottle of this once a year doesn’t hurt.