I'm currently installing the invisibleSHIELD on my MacBook and I'll post a full review later.
Those side pieces from above that you weren't sure of go along the front side!!
Also, a tip is to OVERSPRAY so that way you can slide and adjust the shield when it goes on. I have the IS on my iPhone 3G and it will reduce the wear and tear of your gadgets in the long run!! BRB!
After the problems I had with my first IS, the company sent me another. The results this time were much better because I knew what to do.
As iphoneCDN says, the key is to use a lot of fluid so that the shield glides on the metal. If any part of the shield is misaligned, lift it off, apply more spray, and try again. It also helps to work under bright light.
The edges are tough, especially on the lid assembly. You have to keep adjusting the plastic in tiny increments by sliding it with your fingertips while making sure that it doesn't move too much or wrinkle elsewhere. Again, lots of spraying helps. The only downside of using extra fluid is that it takes more time and pressure to get the shield to adhere at the corners.
Eventually, I was able to get the IS almost perfectly aligned, although there was still a tiny bit of overhang at the back edges after it dried. That doesn't sound bad, but it looked like the shield might eventually lift off in those places, so I cut away the excess.
The shield that goes around the keyboard went on more easily this time. It still doesn't fit perfectly around the trackpad (probably because it stretched slightly during application), but this area is subject to wear, so I've decided to keep it.
As others have said, the inevitable bubbles eventually disappear. The only exceptions are ones that have a bit of dust in them. I have one of those, but it's not very noticeable.
Overall, I'm reasonably happy with the IS. It definitely gives the MacBook a sheen, but it's not objectionable and so far has done a good job of protecting the metal. But I'd prefer it if the computer came with a finish durable enough resist scratches and scuffs to begin with.