Not too bad. Lean over a little earlier. You tend to stay too upright in the first part of your descent. Leaning over more may also help you at the bottom, where you have more back angle change than I would like to see. Drive your butt up, not back and keep pushing with your hips all the way to the top. Watch the video on bar position on this site. The bar looks like it is rolling up your back on every rep. That may be because you are carrying it a little too high.