I have my MBP in a clear Speck Shell...then I slip it into one of these nifty cheap sleeves I got off of Ebay...
http://http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rt=nc&nma=true&item=250725480210&si=O8CYv6zT%252FttEZl84uXVssJKZiI0%253D&viewitem=&sspagename=STRK%3AMEWNX%3AIT
I also keep a Moshi guard between the keyboard and the screen when closed.
I am thinking about protecting my MBP 13in with invisible shield. Go to www.zagg.com. It will cost me $55 for the whole kit. Rather than shell case. In my opinion shell cases will look cheap after used for a while, how i know? cause have it on my MBP 15in. Plus, shell case gives an extra weight. I also have the incase neoprene sleeve to put in my backpack. I already have the STM messenger bag if I want to go lightweight.
The invisible shield is suppose to have an extra grip on your MBP since is made out of high quality plastic adhesive material.
looks super thin man I wouldnt do it I like my speck hard case because i know if something kinda heavy falls onto it like a shoe or book the computer will be safe.
What case do you use? Did you purchase a hard case? Sleeve?
(Not sure where to post this.)
I pay an armed 24/7 Security Guard
Honestly I use a Speck Black "Silky Soft" Hard Case
-Nate