Longevity, this thing will never die. I use it now for my magicjack. Used it for school for over 4 years, bought it used, has the best keyboard feel of any laptop I've ever used. In fact, it feels better than most desktops.
Batteries suck and structurally it's falling apart but now that I just use it for my magicjack it just sits there and has no structural stress. I had to get another 256mb of that PC100 SDRAM for XP but it runs it.
This is from an age when Dell was good. Today, all laptops are made in China crap. i would never invest serious money in one today.