Don't even think about it, just download it and run it.

I’ve been very careful over the last year or so to ensure that my images are all sized for web and under 300k each. Most of them, in fact, are running around 150-200k. Surprisingly, however, my wp-content directory keeps growing, seemingly exponentially. I was ready to basically nuke my entire install or just fork over another $10 / month just to get an extra 2gb of storage. Neither of these options were ideal, however, as that wouldn’t fix the problem, it would just delay the inevitable.

Looking around for some help, I came across reviews for this plugin. I installed it, then backed up my entire site just in case. On the first run, I cleaned up over 900mb of unused / unreferenced images! After running the blog again for another week, and creating another post, I saved another ~20mb.

Though I did have an issue with memory settings, the developer was amazingly responsive and kept me in the loop for when a fix would be coming. Mind you, the biggest fix was saving me 900mb of space, but he was still working diligently to solve another minor problem I was having with memory issues when running the plugin the 2nd time.

So 13,000+ unnecessary images, 900mb saved space, and one happy plugin user later… I’m sold. Don’t even think about it, just download it and run it.