Macro keyboards are mini programmable USB keyboards that can be pressed to trigger shortcuts, a sequence of keypresses etc. They can have several layers so switching to a different one will trigger different keypresses from the same key, so e.g. different IDEs can be represented.

I've just bought one with a view to setting up shortcuts for debugging. Each IDE has its own unique keys for navigating through the code, so I figure it'll be nice to just press one key to start debugging and one key to step into instead of a combination of ctrl+whatever etc

Do you use one? If so, what do you use it for and what size do you use? Is it too big / too small?