I use All in SEO for my sites, never tried Yoast yet. But I have one doubt in All in Seo. I am adding meta title, description and keywords using all in seo plugin but when i check individual page's source page, I am unable to find the content that i added through the plugin. Can anyone help me to understand what exactly going on with all in seo please.
In my current opinion. Yoast has built the best SEO plugin. http://wpfreaks.com/best-3-seo-plugins-wordpress-2013/
I also use Yoast because of its features. You can select the best keyword for your post and you can add description to it. It has also built in reminder if your post is Optimized if the ball turns from yellow to green.