A lower desk is super-helpful for my illustration/graphic design freelance work. I have a dual monitor set up with a Cintiq and the ability to adjust the desk lower than my old writing desk really helps with the back strain and wrist angle.  Two large monitors and my keyboard and mouse are the all I have on my desktop; I couldn't fit my tower, but a small enough tower will fit on the rack below easily. (Mine is a monster) Once I finally get rid of my huge set up, I can't wait to use it as more of a standing desk.