I purchased the SteadyPro 2 for a variety of uses....selfie narrations, volunteer video compilations for an organization I volunteer for, steady pans and a solid hyperlapse platform.The battery unit works well and holds a charge a good long time. I have not yet used it to serve as a power source for my GoPro when attached, but know it is going to be very helpful when in the field, given the always frustrating shortness of their rechargeable batteries.I did find the documentation for the unit fairly slim and relied to some degree on informational videos on YouTube to get up to speed.I also discovered a couple of things:1- Initial charging of the battery was taking forever. I started out attaching it via a USB cable between the unit and a powered USB port on my computer, and after trial and error discovered that it is better to use a USB wall plug to cable connection for charging. Then the charge time is much closer to the roughly 90 minutes or so for an initial charge.2- I was initially having troubles getting the joystick button to do its job of rotating and tilting the camera when pressed but after numerous tries discovered that the problem was mine. I was trying to push the top and bottom edge of the button to activate tilts, and right and left edges for pans. Finally I discovered that you push the entire button up, down, right or left....and not just an edge to make it work.It is also clear that for best stabilization, the secret is to make sure your action camera has image stabilization activated. That, coupled with the additional stabilization provided by the Pro2 produces quite good stability.I am looking forward to getting much more stable hand held footage for my projects and again, am quite happy with the combination of features and price. My only reason for not giving this five stars was rather skimpy documentation in both the packaged instructions and Hohem's online tutorials. I'd suggest adding notes about best methods for charging and making it clearer how the joystick button functions.