There is so much fail in this thread. Staples chairs are the bottom of the barrel crap chairs. They have poor construction, crap foam under the seat among other things. As always in life you get what you pay for.
Most of the chairs sold at Staples, Office Depot and Costco are from 3 places. They are manufactured by HON, Global or off shore from China. The Global and HON chairs are the cheapest models those companies sell and the markup is actually quite high on them because they are so cheap to produce. If it says it is a leather chair do some research. Chances are that not all the material is leather only sections. It will also probably be a split grain leather which means durability will be poor.
If you want a proper ergonomic chair with good quality and a great warranty, go to one of the Contract furnture companies in towen. To get a quality chair you should budget at least $450.
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