Just flew it for about 15 minutes so need lots more time for full evaluation. I watched it around roof very closely (very windy) and kept glancing at monitor. Lost sight couple time on back roof with no issues. I can switch from video to camera in a second. Also it hovers very well (stays pretty much right in place) so if something looked like an issue can fly quite close and snap photos. Photos are downloaded onto micro disk on phantom. I can move camera any way I want including straight down with phone app that attached to monitor. When it landed just upload them to my iPhone for instant review. Not saying it's the answer to never walking on roofs but I come across some difficult roofs(as we all do) where I believe this can be very useful. When I did the 1st video the drone was up 400 feet up/out and well out of my vision so had to rely on monitor. Also went so far it lost signal and iPhone app said "signal lost heading to home base". After about 5 minutes could hear it then soon see as it began to come down directly over my head on an automatic flight land path when I was to regain control and land. So far the hardest thing is getting use to flight stick. I want to be able to fly it where I want too without thinking about flight controls. (elevate ,turn, throttle up or down, back or forward, etc.) I figure it will be about a month before I use it on a job. Need lots more flight time to feel comfortable. Or then again it may just turn out to be expensive toy after all.-time will tell. John