...mouse - this one:
She says it's da bomb.
Seems fine to me; it uses up some of a bigger hand by catching the top pads of the palm, leaving the fingers to do their job more independently.
We've both had the Logitech VX Revolution for several years (love 'em) but I have always felt that the base of my palm rests on the desk and the next part of my hand contacting the mouse is my fingers, which leaves me to clamp the mouse between my thumb and pinky.
Works okay, but the new one moves under palm pressure, and right easily too.
Maybe another new one soon for old j2.