I've been looking for a plugin that can reduce and optimize image for web use. This plugin helps reduce images to certain percentage including those images that I have already scaled properly. Although, the plugin has issue when it comes to bulk smushing of images, I still give this one a 5-stars due to its effectiveness in terms of optimization.
Suggestion to those who have 100s of images, smush them by batch as this plugin hangs. I was having the same trouble, but managed to figure out smushing all the images completely. My 5 star rating as mentioned, is for the effectiveness when the images are already smushed.
Bulk Smushing Rating = 2 Stars (Hangs and no indicator)