The phrase "astounding experience" is correct and usable in written English.
You can use it to describe an experience that is remarkably impressive or surprising.
Example: "The concert was an astounding experience that left everyone in awe of the performers' talent."
Alternatives: "incredible experience" or "amazing experience."
But an even more astounding experience awaited me with my newest children's project.
Cue (Jesse Zunser): It is an astounding experience to watch Orson Welles, 25-year-old Boy Genius of the Western World, in the process of creating on the screen one of the awesome products of his fertile imagination.
Old timers will tell you that Burning Man hasn't been its wild self since the '90s, but to the newbie it remains a pretty astounding experience.
"That meeting was one of the most astounding experiences I've had in my 34 years in politics," Senator Schumer recalled.
One of the foremost experts in working with the ultra-wealthy to create unique and astounding experiences is Steve Sims, president of The Bluefish and author do Bluefishing.
Long suffering ghost hunters told of their evolution in learning different techniques, being disappointed, but also having astounding experiences.
Alex has created an astounding learning experience in her class.
Pagani cars "do what most other manufactures have forgotten, which is to provide an astounding driving experience for a driver who knows how to drive them," he said.
Intense and intimate, with the crazy, nightmarish feel of a Bosch painting, "Downfall" is an astounding film experience for those with the stomach for it.
He answered: "I have had the most astounding and happy experience.
A recent spate of papers in some of the world's leading medical journals demonstrate that in small studies, human subjects following such diets experience astounding drops in cardiovascular risk factors; a forthcoming review on cancer risks in animals with such diets, moreover, suggests a stark correlation — fewer calories mean fewer tumors.
