Agree, WarBar1. If I click on a review, I skim. 
1. How many stars?--as in "three out of six"
2. Who's in it? (less likely to be useful, as so many of today's "big stars"--especially the women--are unknown to me.)
3. Genre that is appealing (romantic comedy, no; western, maybe, drama, probably yeah...)
4. attempt to avoid paragraphs that divulge what happens and how it happens. 

Best way to get what I need and avoid what I don't is Wikipedia, where I simply skip the section headed "Plot."