I have no. 11s.
And other wrinkles in that central area, between brows and just above them. Very pronounced when I frown, which it looks like i am, A LOT
I also have crows feet and laughter lines, but these truly don't bother me. I wouldn't want anything done to them.
But if I had my brow done, would this work? Would I look weird with 'nice' brow but expressive rest of face?
I really hate my brow 
Botox ain't cheap (for me) but I'd do some overtime if there was a chance it would improve my expression!