I think mRemoteNG is a great tool for managing multiple SSH sessions.
BUT, I second this motion!! The people who use this utility are using it to *increase* their productivity.
By far, my biggest complaint is the amount of time that I waste switching tabs, typing in a command, then realizing I didn't physically grab the mouse and move it over to click and grab focus in the SSH tab. This is an unnecessary extra step that forces you to take your hands off the keyboard, find the mouse, click in the tab, etc ...
I would also suggest adding in some form of keyboard shortcut to "duplicate the current session in new tabbed window". If this shortcut currently exists, I couldn't find it. The 'CTRL + Right Click' => 'Duplicate Session' option actually opens a new [b]UN[\b]tabbed SSH session. Right Clicking on the tab title => 'Duplicate Tab' is the only way I found to duplicate a tabbed session. I think this action could use a keyboard shortcut.
Just my 2c ...
Thanks in advance,
Shane