If 你 are buying a new Mac consult this page first! It contains information about average product cycle for each of the product families giving 你 a good sense of whether 或者 not a product is likely to be upgraded soon.
There is a giant thread on Apple’s website about the problem many Macbook owners are having with discoloration. One user found the magic solution: nail polish remover.
I'm a huge 苹果 fan, but their products aren't always perfect. If you're looking to track a problem with your current machine, this blog is a great place to uncover known defects and attempts at resolution.