Having tried many different linemounts, my preferred is the UGo, both with or without the Quark (which is dead now...).
Two issues, #1 is when having the cam centered you can see the "V" and stopperball blocking your view a lot.
#2 is when getting slack lines (like when riding on a waveboard or when on a hydrofoil in really light wind), a rear line can easily get tangled inside the camera.
To avoid #1 I offset my cam a bit, to get it a bit more away from the line connection, using angled mounts.
Only disadvantage is if you slide launch, it can pick up grass, and be more exposed - but if having a helper to launch or if stake launching, no problems - only in sub 8 knots of wind it is more difficult as you can not run backwards to reverse launch like normally...
#2 the slack lines where a line gets caught, can often be untangled again, if one either tugs hard when kite overhead, many times, or if you put it on its side on land (dont want the cam lens to get wet, so I dont do it on the water).
Still, it is an aaaargh PITA thing, and if really powered not very good/nice for your gear
So, I have simply made a safety line on the socket of the GoPro holder, which goes across to the UGo, thus even if the UGo or one mount should break, the camera is safe.
AND, it avoids a rear line from getting caught around the camera.
Two in one, works just dandy
An example from yesterday, when offset a bit like on above picture (no stopperball on this pic though):
Not perfect as sometimes the connection (or stopperball) will block your head, but I like the view from "inside" all 4 lines so to speak.
If one mounted it upside down so it sits on top instead, it also works, but more unstable in heavy winds of course, pointing up and forward into the wind, and sometimes the stopperball will block something else then....
Maybe ideas some can use?