I took my Macbook 13" Unibody late 2008 in to the Apple repair store last week because the trackpad had been very stubborn for a long time. I ended up having to pay over US$90 to have the track pad replaced. However, the reason they told me for the problem was a swelling battery, but they would not replace the battery unless I traded in the old one to them and paid a further US$120. So much for Apple replacing defective batteries. Apple shares are at an all time high and they exploit Chinese workers to increase their profits, and no doubt manufacture poor quality batteries for which they charge extraordinarily high prices. Don't be taken in by their mouth-watering advertising. You have to pay for their mistakes to keep their shareholders happy.