Quick overview of the Kirkland Signature 4 Wheel Hybrid Roller Bag. They also now make a soft 4 wheel roller and I made a video on it here: https://youtu.be/FpHZN4O3mls
Carry On that I mainly use: http://amzn.to/2nmz1BE
This is not a paid product endorsement. I purchased this from Costco Warehouse.