Excuse me?
All I said was that the product isn't necessary following a substrate swap in a cycled tank, and the OP could save his money... it would appear that YOU are the one following up with personal attacks. You are not the only one posting on this site that has years of experience in the hobby, nor are you the only one that has worked for a LFS.
The fact is, you do not need a bacteria booster for a substrate swap, given that the tank was previously established (in this case, it was), and that the filter media was saved (in this case, the OP has been a member here for a while and I'd just about guarantee he knew better than to toss that media)- provided you are willing to do some extra water changes and testing. Sorry that offends you so much.