Johny, I'd take that range estimate with a large grain of salt, kind of how the FRS radios advertise a 20+ mile range. Essentially, the range is going to be line of sight, though the frequency they're operating on, it may be a little shorter. Also beware the flight time estimates too. The agency I work for has dropped one of the Dji drones in a lake, because it ran out of juice before it was suppose to. When they use their drones, they project the received images on a large flat screen monitor. It's like watching a movie, pretty neat! Now imagine your drone plopping down in the middle of an opposing force encampment.... nothing like letting the enemy know of your presence and some of your capabilities.
If I was in the market for another drone, I'd probably go with the one you specified. It seems to have the best value, and it has lots of capabilities. Be careful, drones can become addictive!