Staples Multipurpose is not much more expensive than regular copy paper and is a higher quality paper. It works flawlessly in all of my printers laser and inkjet.
I have used the Staples multipurpose paper for years now and in all of my machines (copier printer fax) it has performed just fine. I also use Hammermill and as far as I can tell there is basically no difference. The brightness is fine and it appears to be a true 20 pound paper. It holds up doesn't jam anymore that any other paper that I have used and seems to age as well as any other brand that I have used in the past. So long as it is priced cheaper than the competition I will continue to use it.
I own an architectural firm and we make lots of copies of our drawings for our own review and for clients to review. Drawings are hard to read on 8 1/2" x 11" paper so we copy our drawings to this size paper. We also print out color copies at this size for our clients. They love this size paper. I would recommend this paper to any one in the graphic arts business architecture or engineering.