I bought this for photo editing on Lightroom, as software exists which allows you to assign specific functions to each button, knob or slider. It gives a much more tactile feel to editing in place of having to accurately place the mouse on a setting.
The controls are sensitive enough but every now and then it does respond immediately to a press or turn or slide. Overall it is worthwhile as an alternative way to edit and pretty enjoyable too. If you set it up right, hand an finger movement will be minimised so there will be little of fatigue you may get when using a mouse.
While it more expensive than buying from America, I was happy to pay the local price and get faster delivery.