After many years I would say the up and down the steps of the package car and delivery points is one of the major factors that wear out the body the most.It only took me a week of training and 1 week of oh, did I do that right... And I've been fine since.. I'd really love to know what you seasoned veteran drivers consider the hardest part of driving PC's are... Curious if I've even been the yet in the 5 months of driving, and haven't noticed..