The phrase "astonishing benefit" is correct and usable in written English.
It can be used to describe a benefit that is surprising or remarkable in its impact or value.
Example: "The new technology offers an astonishing benefit to users, significantly improving their productivity."
Alternatives: "remarkable advantage" or "incredible benefit".
The experiment also measured the astonishing benefits of morphing wings: Swifts can double their gliding time or triple their turn rate by morphing their wings.
The astonishing benefits of turbo process enable the proposed joint channel estimation, synchronization, and decoding scheme to provide a near ideal BER performance over a wide range of SFO values without the needs of known pilot tones inserted in the data segment of a burst.
Lloyd's production – with its clever framing device in which the women in the prison are putting on the plays and in the process discovering themselves – is a glorious reminder that genuine diversity on stage offers astonishing creative benefits.
Science has been built up over many centuries by millions of humanity's finest minds constantly arguing with and challenging each other's views; repeatedly comparing those views to what actually happens in the lab and in the real world; and striving to deliver astonishing results that benefit our lives every day.
Some of the details are astonishing, but they would have benefited from citations.
In the midst of a national debate about how to improve benefits, it's astonishing that anyone would think that's in the public interest".
To date, Mr. Blunt's re-election hopes have benefited from the astonishing sum of $13,764,838--think 13,764,838--think 13,764,838--thinkrs can buy!
In late March, Republican-dominated Michigan became the first state to reduce unemployed benefits, lopping off an astonishing 6 weeks from its current maximum of 26 weeks.
Factoring in the consequences of sentencing is sensible as well as humane: "We are making an astonishing investment in something of limited social benefit.
With the benefit of hindsight, it seems astonishing that the danger Hitler represented wasn't obvious to everyone, particularly to experienced foreign correspondents.
