Is the Jessica Simpson Vibrance set worth it?

For budget-minded travelers who fly a few times a year, yes: three expandable spinners with TSA locks for roughly the price of one mid-range bag. If you check bags often on rough routes, spend more on polycarbonate.

How does ABS compare with polycarbonate?

ABS is cheaper and lighter to produce but less flexible and more prone to cracking on impact. Polycarbonate flexes and springs back, so it survives baggage handling better at a higher price.

Can the 20-inch bag be used as a carry-on?

Yes, the 20-inch spinner is the carry-on piece. Check your airline's size limits, since wheel and handle measurements count toward the allowance.

The 28-inch, 24-inch and 20-inch spinners. Nothing else is included.

Are the bags expandable?

Yes, the set is listed as expandable, which adds a couple of inches of packing depth. Expand a checked bag before weighing it, since the extra room adds weight.

Luggage sets usually drop during back-to-school and Black Friday sales. The latest best price is already near the low end of its recent range, so waiting may not save much.