If you already have a slider you should check out the Genie, just add it to your kit and you've got motion control on all your existing gear, easy to use as well. www.syrp.co.nz/products
I've just started to shoot video with my DSLR recently but that looks like a great piece of kit. What a pity I don't have 1k $ lying around. It seems a good bit more reasonable than buying a proprietary element which can only be used with the slider it was designed for.