Some employees are the biggest con I go to right away. You will come up face to face with quite a few people who just don't want to work at all. This means ANY physical labor is "excessive" in their eyes. I watch people in and out all day long perform Time Off Task (T.O.T.) mostly people just wander around talking to friends they made while working here, or family that works here as well. I don't mean just dropping by to say hi and leaving. I'm talking about people taking 3-20 minute blocks of just not working because there isn't a Process Assistant or Area Manager around to catch them.
That is my biggest problem with this place. It's not an Amazon problem per say, I would imagine any warehouse would have this issue of "when the cat's away, the mice will play" going on. Just here, the people seem coddled to be honest.
Other than that, the physical labor (to be expected) will have you sore the first few weeks especially if you came from a job that didn't require you to be on your feet for 10 hours at a time, lifting boxes or totes most of the day (if you land that job that day)
The parking lot is the other negative (which isn't Amazon's fault). The township's fire marshal wouldn't authorize a second entrance/exit for cars, so everyone on that shift has to wait a solid 30mins to an hour to get out during "Peak (early November - mid/late December) Note that during non peak times, it's usually a 5-10 minute wait tops before it's clear driving right out.