I bought my macbook pro in 2009. The major reason was the fact that "it lasts a long time" and I wouldn't need to upgrade or it wouldn't die out on me... it's held up really well, but I've also not overused it like I did with PC laptops I've had before...

I originally bought it when I thought I was going to be law schooling full-time, but now it's just for part time mba/leisure use.

How often have you had to replace your macbook?