I really like applying it with the 168 angled contour brush!
I know, I know.
I apply a pea size of Studio Sculpt on the back of my hand, and then carefully dip my brush in there - only enough to cover the first part I'm going to apply (one of my cheeks). Then I stipple it on with the brush until it's blended. I don't swirl. I think it gives great results and also very good coverage for the amount!
I've also tried the 190 foundation brush. I do the same thing, put a pea size amount on the back of my hand, dip it in there lightly to get enough product to cover one cheek, and then do paintstrokes.
I find using the 190 it takes more product to get the same coverage the 168 makes.
I don't use Fix+ for this, also I do have it. Usually I'll just spray that on my face after I've powdered for some delicious dewyness.
Hope that helps!