Great scope. IMHO, they are 2nd to the Hensoldt 4-16 FF. I like the F1 more than S&B 4-16, USO 3.2-17, PR 3-15. Experience based on having owned all of them and testing side-by-side.
I'm just a recreational shooter who plinks steel to 1000 for fun, so simplicity, glass quality, ergonomics, weight and basic mil-dot reticle fit my needs perfectly.