I find it ironic that the US distributor----or at least comments within this thread that are attributed to them, not only acknowledge the existence of the GH-Pro, but also comment on shortcomings to this tripod head? The US distributor flat out told me this head was NOT in production and NOT available. I made the effort to point out the it appeared the head was indeed in production and available by overseas distributors. The replies I received were "stonewalled" and not helpful to say the least.
A complete waste of my time. Sunwayfoto themselves and the Israeli distributor were very responsive to my questions and pointing me in the right direction.
That being said, I did receive the GH-Pro geared head (the one claimed not in production)
There is absolutely no problem with lateral movement, or any movements on the head itself. As to "head lift" or movement on the head itself with camera attached, there may be very slight movement,
if you're trying to induce movement. This was on a heavier camera setup and probably not the rig I would be using or choose for this tripod head. Will it work and be "ok" with a heavier camera? Probably yes, as long as you're not in the habit of grabbing the camera and shaking it while you shoot.
On a smaller camera system, this really isn't an issue. MIrrorless cameras? Sony A7r? No problem whatsoever. The point to realize here is that the capacity of this geared head is limited---it's not meant to compete against the likes of the Cube or a BH-55. (I also would not be using these on a mirrorless camera either!) The trade-off is size and weight---much as stability in heavier legs are traded for a smaller set of tripod legs for hiking.
I do like the much larger knurled adjustment knobs on the GH-Pro compared to the relatively small knobs on the Cube. If you're looking for a lighter weight and inexpensive geared head, and recognize its capacity limitations, this is it, if not for any reason than it's the only game in town. But if you're expecting an AS Cube killer, you will indeed be sorely disappointed. I will probably also acquire the bigger and heavier KPS T5 geared ball head to compare. It is much more expensive and heavier, but its stated capacity places it more in the realm of the larger AS Cube. I haven't made a decision yet on if the GH-Pro suits my personal needs yet.
ken