Ableton Push 2

The Push2 is a great controller if you use Ableton. Worth the money. On the other hand, it is an example of what I term a 'Mouse that only works with Photoshop' -- a piece of hardware locked to a particular piece of proprietary software. You can't use the very nice rotary knobs for anything aside from Ableton*, nor the display, nor the pads, nor the other buttons. This is a perennial source of frustration for me.