I usually swing a cup of coffee out and over my MBP at various times of the day. I figured this was the most probable way to have a disaster and spill it into my keyboard, so I decided to try the Moshi clear guard, after reading about it on this forum. It works perfectly! It is a perfect fit for my 2011 MBP 13. It changes the feel of the keys just a little bit. For me, I like it.