Is it obvious when a girl where's pushup bras? What do y'all think of them?

I used to wear a pushup bra everyday until one day I overheard someone saying pushup bras were false advertising. I ended up throwing all my pushup bras away and deleting every picture where I was wearing a pushup bra. Now, I don't rlly need it cuz I had a major growth spurt (went from an A in beginning of freshmen year to a D in the beginning of sophomore year). But every now and then I kinda feel like it would be fun to wear a pushup bra cuz it's like my boobs r on 2 little cushions. I never do tho cuz I'm afraid of false advertising.
Is it obvious when a girl where's pushup bras? What do y'all think of them?
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