There are other, less expensive single-handed gimbals on the market, but the Ronin-S stands apart thanks to a number of features, such as its easy-to-use setup app and its offset roll axis motor, which is lowered down behind the camera so you can more clearly see the back of the camera as you shoot. DJI also says it uses the most powerful motors it's ever used in a handheld gimbal.
In addition to stabilization, the Ronin-S will connect to a range of popular cameras and allow varying degrees of control, from video start/stop all the way up to remote focus and zoom control.