The Rain Design iLap (any size...) was "designed" for one purpose: A Photo Shoot. The functionality of this product is horrible, namely in the operation of the foam wrist pad. Basically its a foam core wrapped in a velvet[-ish] cloth- and only wrapped. I elaborate there because its the cloth that attaches to the stand (via a sewn in clip), which gives no actual form to keep the system attached. That is, the inner core simply floats around inside the cloth wrapper and the entire pad just hangs from its clip most of the time (if it stays on at all). Now keep in mind, its the pad that keeps the laptop from sliding forward (due to the angle of the iLap) into your "upper" lap. With it flopping about, the laptop proves to be unstable as well, constantly moving out of position. They give you some rubber feet to attach to the laptop, but this solution seems like an afterthought. Who wants to put an extra set of sticky rubber feet on their Mac? Feet that will just fall off after a short time (as mine have) any way. A more intuitive method would have been to rubberize the contact zones on the iLap itself... which brings me to the question of, "Why do I find myself modifying my "designer" laptop stand just to get it to work?"
Whats more, the texture of the cloth on this pad tends to pick up every piece of lint available. Mine, for example, is forever a Splotchy Red from a throw it occasionally comes into contact with. Ugly.
its not really easy to transport. ex: from my living room to bedroom ect. the pad allways comes off and has actually torn at the threads where the plastic bracket is sewn on. it does keep my macbook cool and in place.