As a graphic designer, I have spent the past 13 years hunched over a keyboard and mouse pad, staring into the abyss which is my 21 inch monitor. Not a great position for a guy who no longer enjoys working out. A weak lower back and abdomen is a recipe for problems. The Kangaroo has been great for me because it allows the option of standing for much of the day. This in turn aides me in working my core, and we all know how important that is, right? Dan Sharkey, designer of The Kangaroo, built a specially modified version for me to accommodate the extra weight of papers and books, as well as extensive use of a mouse. Thanks a lot Dan!