The primary benefit I've gotten over just a straight tmux session is that there is a collapsable left "tab" bar that shows you your different workspaces, which you can relabel, and below that is a list of the agents you are running (claude code, codex, etc) along with their status (idle, blocked, working).

So I will start a workspace for each different thing I'm working on, label it "Studio Shed Packet", "Teapot game", "Mux experiment". Then in each one I run a Claude Code. Then I can see the status of my Claude Codes just by glancing at the sidebar, rather than having to switch between screens to see what is waiting next.

I've been using it around a week so far.