That's not quite the range of the Phantom 3 Professional, which managed 2,500 feet without issue, but it's better than the 1,000 feet I got with the Phantom 3 Standard in open space and the 400 feet it managed in suburbia.
Medical specialists with a public voice like Dr. Oz should absolutely be encouraging people who are sleepy to sleep more. However, arbitrarily applying eight hours to everyone is actually harming people who simply need less sleep, or those who actually need more than eight hours.
Aim for Eight Hours of Sleep. Most adults really need about eight hours of sleep every night â not just eight hours spent in bed but eight hours actually sleeping. To accomplish this, many people need to first set this goal of eight hours in their mind and then make practical, logistic changes.