Even though these copters have gryo stabilization, flying them is still non-trivial with the heavy load of a DSLR dangling below with winds. I have seen videos from videographers that hired pilots that weren't experienced enough and attached their expensive cameras and lenses only to see them have a great fall from the sky within a few minutes. You can get experience flying with a heavy load by attaching a box filled with sand in place of the camera. The general challenge with a below-copter mounts for cameras is that the center of mass/rotation of the vehicle is far from where it would normally be leading to less stability. Specifically, in most of the crashes it seems like the update-rate of the gyros trying to correct caused nasty harmonics. There are some high-end gyros that are apparently better at dealing with the odd mass loading when flying with a camera underneath. I haven't the time at present to get into this hobby, but it does sound like quite a bit of fun. Someday...