The JJRC H6C looks almost identical to Hubsan X4. Short review It's pretty stable out of the box requires a bit of trimming. Plenty of power and does [assisted] flips with ease. Unfortunately the remote is pretty crap (compared to my DX6i) probably from a reused USB gamepad. The yaw controls affects the throttle, not sure if because of the combined stick usage or something else is happening there. It's pretty hard to keep a stable hover because of the sensitive throttle. Combined with the issue above it means it's pretty hard to do panning shots - rotating around an object to be filmed. Camera is of low/mediocre quality, nothing to write home about. It's probably reusing a "spy" camera, similar to the one I wrote about: http://hackcorrelation.blogspot.de/2014/03/inside-stuff-teardown-and-repair-of-spy.html The sound is mostly from the engines, to get a decent sound you will need to take the complete unit apart and reposition the microphone by solderin...
Electronics and programming interspersed at various levels of difficulty.