I purchased two pieces of Eagle Creek Load Warrior Luggage about four years ago. The reason I purchased it was the fact that I had never seen a better quality suitcase. It had lots and lots of excellent features including heavy duty wheels, a very strong handle with which to pull it, heavy duty zippers and lots and lots of room. I find that I can pack for up to 14 days in the 30" size and for a week in the 22" size. The 30" size has a zipper pocket on the front that is separated from the interior that can be used as a place to put dirty clothes.
When pulling this suitcase there is no problem with the luggage tipping even if you are running. The handle is sturdy and the wheels are amazing. The best reason to purchase Eagle Creek Luggage of any kind is that there is a lifetime warranty. If anything goes wrong they will repair it or replace it with another, no questions asked.
My youngest son had a backpack that he carried 80 lbs of books in for two years and the zipper broke, I sent it back and received a brand new one free of charge. Eagle Creek is the only luggage for me.