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.
2. Stick to that time every day. Alright, so you've decided that you need to be up by 7 for work, so to get 8 hours of sleep a night you need to go to bed by 11. For starters, cancel all your late night plans, at least for the next two weeks or so. You must go to bed at that time and get up at that time.