We started with 1 stand up desk converter in our office and now we have 7 or 8, everyone really likes them!  Sometimes people need a break from sitting at their desk all day, so this helps people get up and stretch and move around a little while still getting things done.  The quality is good, no set up or assembly required, shipping is fast!  Out of an office of 14 people, 50% now have a stand-up desk!