Austin on the sales blurb it say's "invokes a response every time" it is also said that it was field tested by the great and the good.I have yet to see anyone who field tested it come out in public to endorse the product. I am talking Matt Hayes , Martin Bowler , Dave Harrell.Only once have I seen anything in the press which attributes it's use to a catch , Jason Caan with a big Barbel.I have yet ,and this is a first, to see it reviewed in any magazine or angling paper. I have used it , i was given a trial bottle.At best it made absolutley no difference to catch rates and at worst stopped me using tried and tested (by me) additives which adversley affected my catch rate.I think that until we get some evidence of it's supposed super power your tenner is better of with another firm.If as I suspect it is no better and maybe worse than other products then relief all round as I do not want something that actually invokes a response every time.I have complained to the advertising standards people on the point that by showing a well respected angler in the advertising it gives the false impression that said angler uses the product and also questioning the scientific evidence.