I used AN Sweet Leaf in my last grow (4 white widows) and I THINK it enhanced flavor/aroma some.....not drastic, but enough that I used it again this grow. I am growing Ice from 420 seeds. The plants are 26 days from seed, and about 5" tall with 4 nodes, and they STINK. I have grown this strain twice before, from the same seed pack, and it is skunky and all, but since I have been adding the Sweet Leaf this grow, they smell more as little vegging beautys than they did in prior grows at full flower......SO..for aroma, SWEET LEAF WORKS. I had to start running the carbon filter already, and I have never hooked it up before flower in that past. The only other additive I used this time that I did not use last time is Mother Earth tea (bat shit, kelp, bone meals, etc.) and it has increased the bushiness of the plants, but I doubt it is responsible for the smell (other than my res smells like feces now..LOL).
SO...in my opinion...if you like the stinky, get some Sweet Leaf!

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And don't be letting my son leave Advanced Nutrients empties all over the place....that's a dead giveaway!!

sweet leaf, isnt that just molasses sold at an inflated price?

yes, sweet leaf is just molasses