I don't think they're too bad, barring being a bit long (are they at your waist?)
The boxy cut of the suit, however is the killer here. Shoulders feel long, and it could come in a bit at the waist. I don't feel like the quarters are too horribly closed.
I think the point of a 3 button is to really make a focal point at the top of your chest, so it's VITAL that the cut of the suit complements it. It should be making a V toward the waist to echo the lines at the top (imagine the old Japanese flag and you'll have a better picture of what I mean when I say the line fan out from the center.
Sorry for the crappy pix, but here's my COLORFULCHALLENGE ENTRY Jacket- Fawn and Blue Shirt- Blue and White Tie- Green and Blue Square- Navy Slacks- Grey Shoes- Cigar Brown What I wore yesterday, but today I'm in jeans, as its pouring and its Friday (I walk the mile and a half to work these days)