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.
It's easier to wake up early if you've have the recommended amount of sleep during the night. Plan on getting: 7 to 9 hours of sleep for men. 8 to 9 hours of sleep for women. 9 to 10 hours of sleep for pregnant women. 10 to 12 hours of sleep for children and the elderly.