Vectra 3D - your opinions?

[AyeAyeCapn]

I've used Vectra 3D, the mosquito/bug/flea/tick repellent on Ellie for a couple years (65# half choc. lab 7 y.o. puppy). It is HIGHLY recommended by her vet, and from what I've been able to read. My concern is her fur - very fine, but dense. I'm concerned about whether I get it down to her skin, as recommended.

Any experience? Opinions? Good or bad experiences?