I find it astonishing that they ever thought it could work
amazing: surprising greatly; "she does an amazing amount of work"; "the dog was capable of astonishing tricks"
so surprisingly impressive as to stun or overwhelm; "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying"
(astonishingly) amazingly: in an amazing manner; to everyone's surprise; "amazingly, he finished medical school in three years"
(astonished) amazed: filled with the emotional impact of overwhelming surprise or shock; "an amazed audience gave the magician a standing ovation"; "I stood enthralled, astonished by the vastness and majesty of the cathedral"; "astounded viewers wept at the pictures from the Oklahoma City ...
(astonishment) the feeling that accompanies something extremely surprising; "he looked at me in astonishment"
(astonishingly) In an astonishing manner; so as to surprise or astonish; Very; used as an intensifier
(astonished) Amazed; surprised
(astonishment) amazement, great surprise; An amazing thing or phenomenon
(Astonishment) The state of being amazed or in wonder. E.g., "Miss Elizabeth Bennet! I am all astonishment!" - Caroline Bingley