the quality -lrb- as in sturdiness -rrb- of this product seem fine . what be not obvious in the description be that to use it require -lrb- for all practical purpose -rrb- that you modify the usefulness of you chair . the HUGE hard plastic piece that you bolt onto each arm of the chair transform what have be a comfortable chair into a horribly uncomfortable chair . if you armrest be at all padded , you 'll now be elbow down on a totally non-flexible hard plastic surface that be a few inch higher than you have . another non-obvious drawback be the unfortunate fact that you `` work surface '' just sit atop the hard plastic replacement -lrb- when open forward . -rrb- I suffer through three day of this thing before remove it and boxing it up . if I would keep all of the `` original '' packaging , I would return this piece of junk . the other curiously unfortunate feature be that the work surface be not flat -- at all . I use a Apple wireless keyboard and Magic Trackpad . the keyboard -lrb- which be wonderfully small -rrb- rock back and forth as you type . there be not any `` sweet spot '' on this thing that allow all four corner to be in the same plane . in my opinion , this product be a major failure on several level . I most definitely would advise against it ; especially if personal comfort be even slightly important to you .