The Easyrig vario 5 is the latest and best model and finally allows the line tension to be adjusted. This allows for greater control over a wider range of cameras and rigs. the main advantage is spreading the weight evenly through the hips so that back and neck strain are vastly reduced. It can be adjusted for cameras from 5-17kg (11-38 lbs).
Anyone who has operated handheld for more than a few minutes will think that this is amazing.