We have used Staples copy paper for several years. We have never had a problem (except that the paper wrapped in plastic was difficult to remove - other brands with paper wrapping were much easier to remove). It is an excellent choice for normal everyday business work - the stuff you do 99% of the time. When Staples has a sale and offers a rebate the price is usually unbeatable. The last time we bought this paper the "after rebate" price was $1.00 per ream. I normally mail the rebates rather than do them online and have had no trouble.
I bought this when it was on sale with a rebate. I only ended up paying $5 or so which I thought was an amazing deal. We have one computer with a laser printer but we each have smartphones that connect to our wireless printer. We have access to our printer from the whole house. The convenience is great! The three kids can print from their ipad ipad mini and iphone or the desktop computer. To be able to purchase computer paper cheaply is a HUGE benefit for our family. Additionally I used a giftcard to purchase it so its almost like getting it for free!
I am a teacher so I constantly need to buy paper. This 5-ream case comes in a great size for me to easily carry and transport in my little car. Also there are usually good deals and coupons available through the Staples.com website so you can get the paper at a great price with a big discount. I also encourage all teachers to enroll in the "Teacher Rewards" program because you will get discounts rebates and coupons sent to your email throughout the year which can save you lots of money on classroom supplies! :)