I've heard about it and thought I'd give it a try, but
something feels off. The session => window => panel order seems like a tree structure, but I keep creating sessions and trying to branch out into new windows or panels. Since I didn't read the manual carefully, I ended up with identical panels displaying the same screen, so I gave up after seeing four panels moving in sync...
Summoning agents from the agent is too convenient.
I create a session, summon an agent there, and tell it "You're in a tmux session now. I want to summon other agents, so please create multiple windows." It does exactly that.
I then instruct it to have various models with ClaudeCodex codecs work together. It works well.
It seems slower than summoning sub-agents internally, but it's more visually appealing.
It's fascinating.