I've bought quite a few products off of AppSumo, but this one is the first one I've "stacked" (I plan on stacking Missinglettr Curate next).

This is just a no-brainer. I like this even better than Frase.io (which is a pretty neat piece of software, too).

It's so easy to use, and having the ability to quickly create content that is well-diversified with related terms to your primary keywords is a great feature on this tool.

I cannot emphasise how awesome this tool is =) I'll probably get a few more codes before this deal expires.