Just new to cnc myself and still building my plasma table and learning as I go.
As you might know from my post I am trying to fix my mpg, I think it was a power spike that caused the mishap.
But it gives great flexibility and precise movement like steelcogs mentioned.
At the moment I am using a Zoweetek Ultra slim wireless keyboard, Model: ZW-51012-1 and I find it good cause you can do all your keyboard commands and you are not tethered to the Masso, Pretty handy with a 3.1 meter long table. "Just something to think about"
But all said when I get the pendent going again I am thinking of a longer lead and will make me more than happy.
Only other thing, if you go for a pendent get one with an E-stop.