Just started using it a few days ago, and the app was really fast to rank my page it only toke a few days to show up on Google.

As it works it dynamically creates meta tags that fit our content. We can actively promote x keywords (x depending on our tier)
Once we rank we can change the keywords.
They also offer analytics features that allows us to check our own pages for errors missing tags and so on.
There are tracking features that will track how our website is doing since starting using nytroseo.

There was a on-boarding meeting very useful where i was guided on best practices in general seo and also nytro specific.

Overall a great product hope to see it grow.