The phrase 'challenging but satisfying' is correct and usable in written English. You can use this phrase when you want to describe something that took effort to accomplish, but was ultimately rewarding. For example: "Doing my taxes was challenging but satisfying - it felt great to finish them and get my refund!".
Early reviews of Ms. Ozkei's new book, released on Tuesday, describe it as challenging but satisfying.
"We've been able to re-create our lives through challenging but satisfying transitions," Ann continues.
Waterville saves its best for last with a run of demanding but satisfying challenges from the eleventh, a 500-yard par-five down a tunnel of sand-dunes.
What followed was eight hours of challenging, satisfying footwork, from the initial precarious barefooting across a wide, thigh-high river to the innumerable viewpoints the Rim Trail afforded of large, small and middling waterfalls.
To attend one of Mr. Burge's recitals, critics almost uniformly agreed, was to hear a challenging yet immensely satisfying program that showcased his immense technical facility; prodigious memory for the works' myriad rhythmic, tonal and stylistic complexities; acute musical intelligence; and rich command of aural color.
The performance itself was uneven but satisfying.
Life was stressful but satisfying.
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MA of Applied Linguistic, Maquarie University, Australia