I have it in one of my tanks. I also have laterite in one and eco-complete in another. Of the three, the flourite is my least favorite. I think some of it is the color. It's rusty-reddish. It's pretty, but I find I tire of it. I like grays and black better for substrate.
Also, if you have plants with nutrient-hogging roots, I think the laterite under the gravel is better.