Better places to work, I quit, I didn't get fired. - Operations Manager FedEx Employee Review

You will get in incredible shape

Not really any I could think of

One of the benefits they list to get you in the door is TOP RATE pay*. The top rate is currently unknown but general consensus is 20 years to top rate pay. If you love standing around making up stories in your own head for two hours while spreading rumors amongst your unabashed co-workers about other co-workers you’ve interacted 2 minutes in the year you’ve worked together then this job is for you! Minimal logic involved.

Fellow employees will unionize to get you out of your route. Employees will make up stories to pit employees against one another. Fellow employees will threaten other employees for being friendly to one another. The management is willing bend over backwards to give you a bad review if leaving for another job. Co-workers are extremely bored and in most cases workload differs dramatically depending on where you are on the sort.