wow factor

noun

noun

Informal The feature of a situation, product etc. that generates amazement and excitement.

The Zaha Hadid-designed Aquatics Centre provides the wow factor for London's Olympics but its legacy is contentious.2012 January 28, The Guardian:
Today's Nissan GT-R, for example, is a shockingly rapid and capable machine, but it doesn't have the wow factor of a Lamborghini.2015, evo: Supercars, page 9:

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