This needn't be a writer. Mellow music will slow your reading pace during rewrites. It's hard to rush through a chapter when a slow tempo is playing in the background. DO take every suggestion into account. Just as you have to sort through what you don't agree with, you also have to open yourself up to accepting suggestions.
Most critiques are well-meaning.
If your critique partner is good with pacing and advises you to quicken the pace in a scene, her advice will more than likely improve your work. This is punctuation, sentence structure, and techniques. We all know about this one. That's one of the first things I check for now. Do a search for misused words that you tend to use and over look.