RonFrank:This works well right to the point it does not.
What I mean is that curb side is not available for all airlines, and especially may not be available for international checking.
Showing up at the airport with an oversized or overweight bag assuming that you can slip it by is kinda asking for issues.
This is not a comment on this bag, but more of a general comment on assumptions made during travel.
Just to be safe, carry with you another bag that takes up little space (rip stop nylon is what I use) in case your main bag is too heavy and you need to quickly offload and hand carry. These bags weigh almost nothing and take up little space. We carry these on all trips for the extras that accumulate and the variations in airport scales. Some airports seem to add a few pounds and use it as a profit center!