As a research project some colleagues and me are trying to develop a motion control unit for a camera slider that can be controlled by an iPhone/Android phone.
Before we start designing this unit, we would like to hear about the past camera slider / motion control experience of people.

Have you used motion control for your camera sliders before? e.g. Kessler Crane Motion Control?
How did you like the experience? Was it easy to use? How did you perceive the rental/retail price of the solution?
Would you use it again?

Even if you haven't used motion control before, would you be interested? Under what conditions?

Also we have prepared a little survey to structure these questions: AdvntrSlider - Motion Control Camera Slider