Review on Optimized Neewer 31.5-inch Motorized Camera Slider: Wireless Control, Carbon Fiber Track Rail with Silent Motor, Time Lapse Shot, Follow Focus Shot, 120° Panoramic Shot. Supports DSLRs with up to 22 lbs Load Capacity by Brett Cat

Everything is well thought out except for a few areas. Tracking video mechanics are rubbish. The method they use is useless for a professional session. It could work if you put a GoPro on it. But with something the size of a DSLR or camcorder, forget it. He pans and shakes the camera. I unplugged mine and installed a professional ball head mount. With which I manually tracked the video. But I think you get that for the price. Another element I found poorly designed is the assembly that you mount the camera to and that allows you to pan. Yes, it's good that it uses needle bearings and that makes it very smooth. But there is too much slop to make smooth transitions from panning left to panning right. I had to add a teflon gasket to tighten it. i kept it I didn't return it as I needed it for the weekend and didn't have to budget for a Rhino or similar slider.