Solid product that keeps getting better
I bought Writeseed with mixed feelings and it has turned out to be a solid product. The developers keep adding new features, and the quality has clearly improved with each one — it's not one of those tool that shipps and then goes quiet.
What I use it for most is content and article writing, and it handles that well. The template library is broad enough that I rarely start from a blank page, and the Brand Voice feature makes the output sound like us rather than like everyone else. Working in German and Spanish as well as English, the multi-language support matters to me and it holds up.
The Keyword Research tool was a nice surprise — a single search returns around a hundred keywords with search volume, CPC and difficulty, which is more than I expected from a writing tool.
Not everything is unlocked on my tier, some output still needs a human edit before it goes anywhere near a client. But for what I paid, it earns its place in the stack.