Do you use an AI Email assistant? Which do you recommend?

We've seen so many AI email assistants pop up recently. The one I'm most intrigued by is Cora. I just got off the Cora waitlist and am taking it for a spin this weekend.

I still get shiny penny syndrome when I see new productivity tools but I am starting to double down on the simple approach of doing less is more impactful. Cora sends you email summaries only 2x a day, and crafts different responses you can choose from and only surfaces the most important items so you aren't reacting to every item as it arrives and aren't living chained to your inbox. I'm excited to see if it actually improves my productivity AND impact.

Have any of you tried an AI email assistant? If so, did you stick with one? What did you find was the most helpful feature?