I used Studio Tech for years and always wanted more coverage. I stayed away from the liquids though because I perceived them as more difficult to apply well. My MA recommended SFF and I am in love with this product.
I apply my serum and moisturizer and then give it at least 5 minutes to set (so key!). Then I apply Prep + Prime. I use Studio Finish concealer and then apply the foundation with the 116 brush. Like another poster mentioned, I apply it directly to the brush and lightly brush it on my forehead, cheeks, chin and nose. Then blend, blend, blend. It is certainly possible to use too much and look like a big clay face. A little goes a long way. Finally, I finish with MSFN in areas where I tend to get oily.
I have combination skin and the SFF gives me a flawless finish without settling or caking. It even holds up well in the midwest heat and humidity. I haven't had any issue with a yellow cast either. I couldn't be more satisfied with this foundation. HTH.
Blonde, blue eyes, NC25.