Here's what I can tell you about the FMA Co-Pilot (not the FS8) which although I have never installed on my cameraship, have tested on my Raptor 30 with a view to video camership operation.
I believe it works really well in 'clear field' conditions. Where I fly here in Malaysia, most flying 'sites' are surrounded by either trees, hills or buildings and I have decided that the Co-pilot will not work properly with these kind of backgrounds.
I'm glad I tried it for myself but am also glad I installed it on my Raptor first before modifying my cameraship to take it.
If you think you will be flying/shooting low/medium level video then it probably will not be of much use to you. I see that a few different people on this forum use it for high level still photography so this looks like the most suitable use for it.
Hope this helps.