Is ABS plastic good for checked luggage?

It is acceptable for occasional trips but less forgiving than polycarbonate or polypropylene. ABS is rigid and light but can crack under hard impacts, so frequent flyers should look at softer or polycarbonate shells.

What sizes are in the set?

It is a three-piece set with graduated sizes, including a 24-inch check-in that measures 24 by 17 inches outside with about 9.9 inches of internal depth. The small upright weighs 8 lbs empty.

Do the wheels rotate 360 degrees?

Yes. Each case has an eight-wheel multi-directional spinner system, so it rolls upright and sideways. More wheels means more parts that can wear out, so check them after each trip.

Is the set expandable?

No expandable zipper section is listed. Pack to the shell's fixed depth, which is about 9.9 inches on the 24-inch case.

It suits light, occasional travelers and families who want a matched set with easy-rolling wheels. It is not built for frequent flyers or rough handling.