The reason for the 4-Stars is due to the fact that each piece of paper is not cut exactly to the same length within the ream. As a result my printer (high-end HP) will sometimes act as if it is out of paper when there is plenty there. I can work around this problem by lightly tapping the leading edge of the stack on the desk before inserting it into the printer to make sure all pages are uniformly presented to the infeed. Still a good deal if it is bought at the right price with rebate.
We buy this case of Staples paper every time our supply is depleted. For those who want name brand paper I suggest you try Staples brand and you will find the same results I do. Look at the money you save.