I bought my Eagle Creek bag about 15 years ago. It has been with me to many many countries as my only bag on extended trips. It always fits into the overhead (well, not the little commuter flights) and mine converts into a backpack as well, which is awesome for those long narrow European staircases.
I LOVE IT. The zippers are tough, the fabric is tough, the wheels are tough. Eagle Creek is a stellar company. I would give  them ten stars if i could.