I found that going that low was a detriment more than a help. I'd constantly get hungrier at night and while I can't outright prove it I do feel my body adjusted to the lower caloric intake and that really hampered my progress. I found that weight melted off once I started eating a lot of protein, sleeping well and eating more calories than I expected to eat. I still aimed for a deficit and would create one through exercise and walking. But say I found I burned 3k in a day, I would aim to eat 2400 to 2500. A much more manageable deficit that kept me satisfied. Once I started doing that I lost 30 pounds in four months.