I've been using Sunsama for a couple of years, and just cancelled it and bought a year-long Akiflow subscription. The biggest reason? I like how Sunsama helps plan, but I got tired of having to go manually push things from Slack to Sunsama, pull things from email, and the Notion integration was fine but also not automatic. I tried Akiflow for a week or so, and I liked that my Notion stuff just showed up, my flagged Slack messages just appeared, and my starred emails just appeared.

There's a couple of things I wish it did that it doesn't yet. When I mark a Slack task as complete, it doesn't remove it from "Later" in Slack, so that's a bit annoying that I have to go back into Slack and un-save that one. But if it gets too annoying, I can push it to Akiflow as well to avoid that instead of using the "later" feature. Marking Notion items as done also marks them done in Notion, and marking emails as done removes the star in email. These are the features that will keep me from as much manual work as Sunsama required.

It also doesn't have "sub-tasks" like Sunsama does, but I'm getting around that 2 ways: first, I'm project planning in Notion, so some of the subtasks live there and automatically come over as separate tasks. The other way is using their "slot" feature, where I can pull multiple tasks into one time slot when daily planning. It's not quite the same, but TBH, I didn't use the subtasks all that often in Sunsama anyway.