I have it for Grand Isle, Coco/dularge and BL. Not VBay though.

I'm going to get me a few of those for the areas I fish

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They are mostly a feel good thing - it feels better sitting on a spot that someone claims to have caught fish at before.

Other than that, there are so many spots on it that you are just as likely to catch by reading the water and fishing random areas...

Navionics Charts do show quite a bit of all the reefs; not 100%. They don't show little Diamond reef which lies southeast of the main reef 1/2 mile off. There are 2 reefs to the west before pavy that has torn up a few lower units. Never seen them exposed at low tide.