I wanted to whare my experience will all of u, as I've been following FT team for quite a while now, it's my turn to give good tips back.
I've been trying to do FPV since more than 10 years now, but things have become so easily accesible now, it's incredible. To get into FPV, I couldn't afford a GoPro, and I was waiting for a good low cost camera to start.
The Mobius HD Action Cam seemed to be a good choice and the price (69$ without SD card) confirmed my choice ; this camera is much better than PilotHD cam inclued in Fatshark Teleporter V3 review, so I now use it also for FPV.
It works really well, even with high contrasts between sunny and non-sunny views.
Image is really clear, colors are a little hotter than on the GoPro, especially the blue.
Another good point is the provided standoff (you can order more like me for all my models..), whitch is great to fix the camera to your different models ! 2 zip ties and you're done ! thanks David :-)
Here are a few recent footage taken in France :
Graupner Electro Junior S with Mobius and Teleporter v3 TX
Tricopter with Mobius (I hadn't a dampening system yet by the time, neither FPV setup)
Hope this will help you to make your choice .. !