A really authentic Grape flavour, I suspect this is exactly what is used in many commercial Grape juices (I'm looking at you, ASAP Grape!).
It is VERY strong though so I advise erring on the side of caution and sticking with less than 5% in mixed recipes as it easily overpowers other things, even other strong flavours like Blackberry!
It can also be a little "dry" on the exhale so adding a little Cactus, Fuji Apple or Koolada helps with that a lot. Recommend 1-2% of Cactus or Fuji Apple, no more or you'll start actually tasting those flavours instead of simply adding "juiciness" to the recipe.
As this flavour is so strong and vibrant I have found no need to steep at all when this is the main flavour in a recipe but leaving it for 24hrs before vaping does improve the flavour slightly. Along with TFA Blackberry and Koolada it makes a great shake and vape for emergencies when you have forgotten to replenish your drawer :P