It is easy to work with NW after the first initial steps of setting this tool up. Though sometimes I feel that the UI could be a bit improved regarding the clickflow. The colors also seem to be lacking of contrast.

As for the tool itself, I think that the limits are quite generous. The results coming from the queries are on point and help me get my content right. Tho I do not always follow the suggestions but it is quite a good base.

What I don't like much was sometimes the limits some tools needed as in "you need at least 20 characters" or "you may not exceed 200 characters" for it to work.

The language support is also great and even usable (german).

It is somewhat faster then other tools in regard of the SEO tools.

Definitively worth for all professionals. I would recommend if you don't have such tool already. The document management is also neat, tho could also be improved UI wise.