What I love about Writer is you can set up your brand and then it customizes the writing suggestions based upon what you're writing. It's been a great way to make everything sound consistent.

It helps me proof write my documents before sending them

It's very easy to use. You jump right in and ask your question and you'll get your answer. There are the prebuilt templates but I rarely use them and I imagine they're really good. I find writing out my prompt to be the best way I think through my ask so I can also tweak the ask in later stages.