I have been using another Seo plugin for 3 years, but I needed to resolve the issue of page/1/ archive so I found this plugin which does also other stuff.
It is completely free and you get a lots of improvements to your website. I advised this plugin to my friends and I saw their website was getting better speed wise. There are a lot of options but even if you are not a Seo consultant you don't have panic.
I have some issues I didn't resolved:
1.sitemap.xml works on some of my websites while others don't, getting a 404 error page, so I had sadly to untick this feature :(
2. post titles: still having issues on post titles which don't show the website name even though I set it in the main settings. :( no idea why.
Apart from that I would strongly recommend and I hope this plugin will be free for life