-Zero work/life balance. Do you have children? Are you married? If you answered yes, look somewhere else. You will virtually never see your children and/or your spouse. I know mothers and father who were constantly torn between family and career, don't do that to yourself, no paycheck is worth it.
-High turnover in HR and in other departments is a definite discouragement.
-They say you can take personal time at "any time" but for Human Resources, that is a joke. Unless you are sick/doc appt/car trouble, you will be guilted into coming in every day except for the precious 7-10 days you take off for vacation. I used my personal time for coming in 10 min late every day for several weeks because I knew I was never going to take off a whole day and I was reprimanded.
-You will be expected to do in 40 hrs a week what should really take 50-55 hrs a week. I was hourly but I regularly took my computer home to work on work without pay.
-They do tell you upfront that you will work the holidays, I was told that in my first interview. But, you have to work the holidays. You will learn to semi-dread the holidays.
-I received little to no training coming into my role. I've heard they're finally setting something up, but Amazon is like nowhere you've ever worked before, and a 2-3 week training is quite simply, never going to be enough.