I do like it!

we use it, it′s a clear guidance through the things “you should do” to raise your position with google; it′s ease to use, no problems for the last months with crashes, so I certainly recommend this plugin

pro version: we haven′t (yet) seen a reason to upgrade (but donated anyhow some coin) but we are not mainly webshop or web marketing, so not really professional in SEO (and don′t want to invest in a pro), so for us the free version works very well