It's ok, but....
$130
And it would not fit on most desks with a slide out keyboard drawer/tray.
oh, and really. putting velcro on our expensive apple products. Plus velcro does wear out after a while, and the velcro tape would eventually peel off leaving you with a sticky mess - then you will be heading to the nearest craft shop to buy more velcro tape.
I think the Twelve south version is better, but I would have a problem. I am left handed. I would have to take it apart to replace the batteries - thus I would be afraid of breaking the plastic tab.
I always figured with the plywood I have in my shed, I will make me a component. First thing I may make would be a cool pad that uses desktop case fans, so they don't break / stop working within the first few months. PLus then I could have one with the fans positions where you need it the most. I have 2 warm spots on my macbook that my cool pad does not hit.
Yeah, that looks pretty ugly. Much rather have the Apple Keyboard+Magic trackpad connected combo