By the way folks this is (if it is an effective approach) the ultimate product... [I'll change my mind when the men in white coats come for me not realising I am Ming The Merciful on a Galactic Mission

]. After all:
i) it doesn't require you to spend *any* time doing it [it is done for you];
ii) it doesnt require any effort ... you can sit there on your coach eating potatoes [er well if you can see your PC from there that is

]
On the other hand wiki says (inter alia):
Effectiveness
The effectiveness of subliminal messaging have been demonstrated to prime individual responses and stimulate mild emotional activity.[6][8] Applications, however, often base themselves on the persuasiveness of the message. The near-consensus among research psychologists is that subliminal messages do not produce a powerful, enduring effect on behavior;[16] and that laboratory research reveals little effect beyond a subtle, fleeting effect on thinking. For example, priming thirsty people with a subliminal word may, for a brief period of time, make a thirst-quenching beverage advertisement more persuasive.[17] Research upon those claims of a lasting effects such as weight loss, smoking cessation, how music in popular culture may corrupt their listeners, how it may facilitate unconscious wishes in psychotherapy, and how market practitioners may exploit their customers—conclude that there is no effect beyond a placebo.[18] In a 1994 study comparing television commercials with the message either supraliminal or subliminal, individuals produced higher ratings with those that were supraliminal. Unexpectedly, individuals somehow were less likely to remember the subliminal message than if there were no message.[19]
Albeit its the usual scientific slur on mind power and belief as "placebo" something unreal as it were ... however as I read somewhere recently we should be aiming to find out how to INCREASE "placebo" effects not dismiss them as nothing!
Interesting background story here...
1950-1970
In 1957, market researcher James Vicary claimed that quickly flashing messages on a movie screen, in Fort Lee, New Jersey, had influenced people to purchase more food and drinks. Vicary coined the term subliminal advertising and formed the Subliminal Projection Company based on a six-week test. Vicary claimed that during the presentation of the movie Picnic he used a tachistoscope to project the words "Drink Coca-Cola" and "Hungry? Eat popcorn" for 1/3000 of a second at five-second intervals. Vicary asserted that during the test, sales of popcorn and Coke in that New Jersey theater increased 57.8 percent and 18.1 percent respectively.[20][23]
However, in 1962 Vicary admitted to lying about the experiment and falsifying the results, the story itself being a marketing ploy.[24][25] An identical experiment conducted by Dr. Henry Link showed no increase in cola or popcorn sales.[23] A trip to Fort Lee, where the first experiment was alleged to have taken place, would have shown straight away that the small cinema there couldn't possibly have had 45,699 visitors through its doors in the space of 6 weeks. This has led people to believe that Vicary actually did not conduct his experiment at all.[23]
However, before Vicary's confession, his claims were promoted in Vance Packard's book The Hidden Persuaders,[26] and led to a public outcry, and to many conspiracy theories of governments and cults using the technique to their advantage.[27] The practice of subliminal advertising was subsequently banned in the United Kingdom and Australia,[21] and by American networks and the National Association of Broadcasters in 1958.[23]
But in 1958, Vicary conducted a television test in which he flashed the message "telephone now" hundreds of times during a Canadian Broadcasting Corporation program, and found no noticeable increase in telephone calls.[20]
Yer pays yer money and yer takes yer choice

Mike