I quite agree that the plane flies very well, but the AFS only works well in a narrow band of lighting conditions, & only if the airframe & AFS are carefully (& correctly) set up. If the set-up is not quite right & the lighting conditions aren't to the AFS' liking, it is a hinderance rather than a helper. I have wasted a lot of my time & students' flying time getting that thing right. It isn't worth the bother.