This camera is newer than the A129 Pro, so there will be more updates coming out. Mine has been pretty reliable though, so doesn't need frequent bug fixes.
From outside, it depends on your car and where you mount it. If you mount it on the dotted area with only the lens sticking out over clear glass then there is not much to see from outside. Mounted under the mirror there is a tube shape visible, but it is not obviously a camera. If you want to disguise it, you can get some screen tint and cut it to a shape that matches your mirror/sensor housing/ existing dotted areas, and then stick the camera to that, just needs a little space for the lens to see through, and since the lens is very close to the glass, the space needed is very small.