This Product Will Change Your Life

"Before this trope, I was a fat, lazy, stupid, unwashed schlub who sat on his couch all day eating potato chips and playing Xbox. Now, I'm still a fat, lazy, stupid, unwashed schlub who sits on his couch all day eating potato chips and playing Xbox... but with a cool new hat! Thankyou, This Trope*!"

The universal claim of every lifestyle product advertised on late night television is that using it will change your life. Be it cosmetics, diet aids, exercise equipment, financial seminars, etc. your life will be miraculously transformed with the acquisition of the product. The testimonials in these commercials tend to feature crying women or enthusiastic men extolling the life changing features of the product.

So call now! Operators Are Standing By!

Examples of This Product Will Change Your Life include:

Advertising

Spoofed brilliantly in a commercial for Bubblicious Bursts, which featured oversized bubbles allegedly blown using Bubblicious Burst changing the lives of everyone around them. The announcer billed it as "great for parties!", "fun with cats!" (featuring an uninterested cat standing next to goldfish swimming in the bubble), and even good for helping Dad around the house. "Just ask Superstar Lebron James!" was the next-to-final remark made in the commercial (featuring an image of Lebron blowing a bubble of generic gum with a superimposed thumbs-up over him). The final remark was a large group of people yelling "Thanks, Bubblicious Bursts!" for no particular reason. (Of course, the company included a disclaimer at the end, stating that "Bubblicious Bursts is great for blowing bubbles, and nothing else".)
Circa 2012, the satellite television service DirecTV was promoting itself using the slogan "Get DirecTV today: it'll change your life."

Film

The Kids in The Hall movie Brain Candy features this testimonial endorsing the wonder drug Gleemonex:

"I used to live on the street. Had cardboard bum from sleeping on cardboard. Then Jesus-- I mean Dr. Cooper gave me his drug. Now I'm more productive. I'm a security guard. With a gun."

Literature

Douglas Adams' The Meaning of Liff lampshades this, defining the word 'Liff' as any product which does not live up to its claims, and specifically any book with the words 'This Will Change Your Life!' on the cover. The book itself, of course, has a sticker stating just that.

Live-Action Television

One of Bernard from Black Books many, many efforts to avoid customers in the store involved him picking up the book closest to the door and handing it to the potential customer, saying "You'll laugh, you'll cry, it'll change your life".

Music

"If You Buy This Record (Your Life Will Be Better)", a song by The Tamperer, as one might guess from the title, parodies this trope.
This Tom Wait's song will Change Your Life.
- skip to 2:34 to hear the trope name and possibly turn into a 9 year old hindu boy.

* Troper General's warning: Results Not Typical. This Trope may cause nausea, vomiting, ulcers, diarrhea, repetition, internal hemorrhaging, fever, fluid in mouth, fluid in lungs, fluid in bones, fluid in fluids, fluid... in your pants, giant festering boils, pestilence, famine, war, death, conquest by religion, repetition, repetitiveness, exploding eyeball, painful death, abnormally fast bone growth, singing venereal worms, slow death, Evil Eye, mild killing sprees, improbably vast breasts, malignant stomach, spontaneous dismemberment, licky end, false sheep pregnancy, megalomaniacal spleen, psychotic uvula, repetition, explosive exploding explosions, hallucinations of bats if you're lucky, achy-breaky heart, knock-knees, pigeon toes, bow legs, implosion to black hole and the destruction of the entire fabric of reality, horrible death, repetition, and repetition. Not for indoor or outdoor use. Do not operate or come within fifteen miles of heavy machinery. Keep out of reach of children under the age of 35. Do not taunt the This Trope. Offer Void in Nebraska. May contain traces of nuts. Not Kosher for Passover. Reg. Penna. Dept. Agr. Walrus.