This guide helped me to remove the keyboard on my MBP, but it doesn't take you further to take the keyboard apart. If you REALLY want to look inside the keyboard, you'll need to remove additional phillips screws (10), and carefully remove the inner plastic/clear layers inside the keyboard.
I did this to look for physical damage inside the keyboard and noticed that the black plastic? sheet was torn on my letter 'v', which was one of the keys not working. I did not see any physical sign anywhere else on the keyboard, though.
So, after pulling the defective keyboard away and installing the new one purchased from iFixit, putting everything back together is not too difficult, just reverse.
One thing, though: Check and double-check before you tighten the case screws to make sure your keyboard backlight is working. I noticed I had forgotten to plug it in, luckily for me before I put all the screws on the case.
To avoid losing any screws, print this guide and use clear tape to tape the screws next to the step. Use double-tape to avoid tearing or one of the tiny screws from falling out.
Thanks iFixit for helping me replace my MBP's keyboard!