Howdy, I have a lot of experience both writing and reading scripts. I'm more or less an expert on scripts. Anyway, I can tell you exactly what works and what doesn't in your script.
Standard gig: I will read any length of script and give you a page or so of what I thought. This will just be a general sense of your movie as a whole. Best buy if you just need someone's first impressions.
Premium gig: I will go through your script and write out idea to show points for improvement and parts that I think would do well.
Extra Premium: Same as above except I will also edit out the grammar and script writing mistakes as I go.