A lot of people use copier paper in their ink jet printer and then wonder why their printer jams and breaks down early. I have learned the hard way that to get grief-free, long-life from my ink-jet printers, it is best to use ink-jet paper. The higher quality results are noticable, there is less dust given off that collects in the mechanism of the printer, and the printer lasts longer.
But more importantly, when I hand someone a document that I printed on this paper, it is not unusual to hear "Oh, you use good paper." That makes me feel good.