ADWARE! Rated 1 out of 5 stars
READ MY LIPS: A D W A R E !
It will show a pop up window when you visit some web sites such as Amazon (but not only).
Here is the proof: http://blog.arpitnext.com/2011/08/chrome-extension-awesome-screenshot.html
God know what else it does with your computer!
Better alternative: https://addons.mozilla.org/en-US/firefox/addon/fireshot/
Doesn't contain spyware/adware.