If you travel frequently (4+ times a year) you will find it nice to have well designed and built luggage.
If you dont travel so much, its kind of a wasted investment.
My wife has all nice matcing Atlantic stuff, and she thinks it is invaluable. She has 2-3 rolling pieces, 2 carry-ons of different sizes, and 2 different make-up cases that all fold out and hang up on the bathroom door.
I still use my freebie stuff from Staples.
EDIT
Since I have crappy luggage, I have no qualms about putting red duct tape (or something) all over it to make it easily indentifiable on the luggage carousel. My wife has to find a nice big red ribbon or something to put on the handle of hers, that invaribly comes off and her luggage looks just like everyone elses.