Problems I see:
1) In the first paragraph, it is not mentioned clearly that the unemployment-reduction effect rests crucially on the money supply increase being unanticipated (this is what theory says, and it has been confirmed in practice). It will also be good if "Phillips Curve" was inserted in the text, and in the tags.
2) The title asks for "long-term" benefits of inflation, the text includes one short-term and one long-term supposed benefit, and the last line asks for "either short-term or long-term".
3) The phrase "possible benefits" does not convey clearly that a decrease in unemployment due to lower real wages is not considered a "benefit" by all (we could reduce unemployment even more by setting the wage to zero) -rather, it appears more to refer to whether the alleged effects truly materialize or not.
That the two phenomena more or less are observed is generally accepted. Whether they constitute "benefits" or not is much more heavily debated, due to the obvious political/philosophical aspect (the unemployment issue touches on distributional issues, the "demand effect" on rationality issues).