I received my invisibleshield for the macbook pro a few days ago. It is not like adding a shield for the iPhone, iPad, or any small device. There are far too many pieces... and the thought of squirting the shields as much as I "should" was not appealing.
As part of their 45 day guarantee, I decided to send it back. Based on how I use my Macbook Pro, I'd rather have something to protect it between locations than a invisible shield. I ended up getting this:
http://www.sfbags.com/products/laptopsuedejacket/laptopsuedejacket.htm
I've got an invisible shield for everything else, but I just didn't think it was worth it for the Macbook Pro. However, if I do come by a mall booth selling/installing the shield, I'll bite. They do an amazing job.
All Best Buy's with Geek Squads will install the Shields, and generally don't charge as much.