I like many things about RankIQ, but the two things I love the most are probably:
1. The Keyword Library. This is such an amazing asset and makes traffic growth a breeze. I've written articles on several of the key phrases in the keyword library, and they are all pulling in great traffic now. With this library, I'm never without content ideas, and what's better: I know that the content I do write is going to rank well!
2. The Reports / Optimizer. As soon as I've decided on a key phrase to go after (either from the keyword library or one of my own ideas), I always run a report in RankIQ. This gives me a detailed overview of the competition, and what kind of content I should create to rank. Likewise, when I find that one of my blog posts are close to ranking on the front page of Google, I always plug it into RankIQ and run a report to get insights on how I can improve it. Review collected by and hosted on G2.com.
The thing that most often irks me is that sometimes when I use the optimizer, I need to go on a synonym hunt to get an A+ score. I get that people use different names for the same thing, but sometimes it feels like the overall style of the article is hurt when I use different words for the same thing. Review collected by and hosted on G2.com.