I'll try to summarize my impressions of WriterZen here.
Somehow I missed the appearance of this tool on AppSumo and only paid attention to it a couple of weeks ago. After that, I spent some time watching a few webinars that I found on their site.
My overall impression after these webinars was very good. Solid and open young team, fast progressing software, adequate response to user requests. In addition, the content writing procedure itself is about the same as I do myself. So the benefits that WriterZen provides were obvious to me, and the perspective of the tool's development seems to me quite successful.
As a result of my brief research, I purchased the Tier 4 plan as the most comprehensive and most convenient for agency work. I was a little confused about what options there would be for the team to work with, which is not there now, but the answers given in the questions section removed my doubts.
I've now been testing WriterZen in the Tier 4 option for a few days now and overall I'm very happy with it.
What inconveniences I have found at this point are:
1. I have to work in German, where I understand that AI assistant is not available. This is not a big problem for me, because I can use the English translation for this. Besides, I have other AI tools like that which allow to work directly with German texts. In fact, I prefer to write texts myself, and use the AI as an assistant, which it is.
2. At some point I had some doubts about how WriterZen works with keywords, and as I understand WriterZen uses ahrefs, so I went directly to ahrefs, which I work with for a long time, to check the result. The result was identical, it's just that my expectations were overestimated with respect to the traffic for those keywords. So, I think if someone doesn't need to be too active with ahrefs, for example to develop a company strategy, then WriterZen could very well save you quite a noticeable amount of money per month.
3. What disappointed me at the very last stage, and for which I take one taco off, is that Tier 4 doesn't give me access to Google NLP. I can quite understand the complexities of the WriterZen team and their marketing approach in this matter. However, purely emotionally, when I buy the highest plan, I expect everything that will be needed in future agency work to be included there. And so now I have the impression that I bought very good and high quality shoes, but one size smaller.
Otherwise a very good product and I wish success to the entire WriterZen team!