Session managers like tmuxinator and tmuxp are unnecessarily complex and counter-intuitive. Some people may enjoy configuring tmux sessions with a verbose and structured JSON or YAML files, but I want the session configured as quickly and easily as possible so I can get back to work.

Also, tmuxomatic offers a great deal of flexibility for pane layouts that is unmatched by any other session manager.

I've got 3 hours into wrestling with Ruby versions (1.7 vs newer) and xcode (command line tools),trying to get tmuxinator to work on my Mountain Lion system.

Just tried tmuxomatic - worked in 15 seconds.