I did top and bottom. After 5 years of use, I have marks around the ports and edges of the laptop. In hindsight I kind of wish I would have done the side skin also. Looks like they're doing a 25% off (with code NEW) plus free side skin this weekend.
If it is any consolation, (not sure if my pics show) the sides don't cover the ports where you said you got some scratches over the years. They do protect the corners. I can see why they throw them in for free. Its a bunch of small pieces vs. a few really long ones. They do protect the corners. I have a pretty good dent on a corner and it's nice to see it covered up. You should know the sides cover the breathe light. I can live with that.You're welcome! I never did install the keyboard piece on mine. Really wished I did the sides on it though as they are dinged up a bit. It will be interesting to see if the sides stay on for a long time or if they peel up after some use.