IS lens could have helped, did not have one available. These things come with two pilots, other is controlling the copter and other pan and tilt of the camera. I've been flying smaller RC heli's as a hobby and they're very hard to control. Takes easily few years of training before willing to put thousands of bucks worth of camera gear on one.
Rent is about 1/2 of a cessna or small heli, but the main advantage being that you can fly very low and near the subject. We used this one as kind of a virtual crane, and made passes just 1,5 meters on top of the subject.

(pictured here - the mandatory heavy metal guitar solo shot)