not all is cracked up to be
not all (someone or something) is cracked up to be
Not as good, enjoyable, impressive, or worthwhile as someone or something is reputed or said to be. Honestly, the movie isn't all it's cracked up to be. Maybe I'm just not the right audience for it. She's supposed to be some expert litigator who can quash any legal case before it reaches trial. So far, though, she hasn't been all she's cracked up to be.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
not all something is cracked up to beand not what something is cracked up to be
Fig. not as good as something is said to be. (Not always in the negative.) This isn't a very good pen. It's not all it's cracked up to be. Is this one all it's cracked up to be?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.