After seeing how many screws were required to replace just the keyboard I decided I would much rather not risk losing one in the carpet or to the cat or half of them stripping (someone in the factory was lazy when they put my macbook together, half the screws were stripped the first time I opened the case) I went with the full top case replacement and I am so glad I did. Some bits may be slightly different if you had your macbook custom built and/or have made modifications along the way like I have, but overall the guide is perfect. Took me about three hours with distractions, but now my Y key works again and the entire setup is beautifully dust and cat hair free!