To start with, I installed what I thought would be the hardest piece, the top cover to the MacBook lid. This was not at all difficult. The best recommendation I can give for installing this piece is to not stretch the shield and to use plenty of spray. To properly align the shield on the lid, try matching all of the corners. Squeegee out the bubbles in a swift repetitive motion. If the corners do not stick for you right away, just hold them in place applying pressure for about a minute a corner.
Next came what I thought would be the second hardest piece to install, the trackpad and palm rest area piece. This piece was much more awkward as it is U shaped. Again, the best recommendation is to match all 4 corners first and then squeegee out the bubbles. You might not want to use quite as much spray for this piece as it is near the keyboard so there is a chance that some spray could leak in. The corners on this piece stick really well as they are not rounded like the lid. Be sure to notice that there is a cutout in the shield for the power button and the mic, which should be easily aligned.
The battery cover and bottom of the unit came next. These were very easy to install. I did remove the battery and hard drive cover from the laptop along with the other bottom piece which is held in by a couple screws. The shield comes with cutouts for the rubber legs so make sure to properly align those.
The rest of the installation is just thin strips of material that are very easily applied with one swipe of the squeegee.
Best tip: Apply the shield in a completely clean area. Any dirt or particles will easily stick to the shield and cannot be removed. Take a thirty minute break in between installing each major piece of this shield and let it set a bit.