Is the Silhouette 18 worth it over a basic hardside spinner?

It adds a full packing system: removable cubes that work as a compression panel, a shoe bag, a TSA lock and a MagneTag ID holder. If you pack with cubes and check a bag, those extras do real work. If you want the lightest possible shell, a bare spinner weighs less.

How does it compare with the older Silhouette line?

This version uses a scratch-resistant 100% polycarbonate shell, the Aero-Trac suspension wheels and the RightHeight handle with 1-inch adjustments. The interior packing cubes and compression panel are the main practical update over a plain interior.

What are the exterior dimensions and weight?

It measures 27.5 inches high, 18 inches long and 11.5 inches wide, and weighs 11.05 lbs. That puts it in checked-bag territory rather than carry-on.

Does it have a TSA lock?

Yes. It has a TSA-approved lock, so security can open it for inspection without damaging the bag. The MagneTag ID holder keeps your identification attached while you travel.

What comes inside the bag?

A crush-proof packing cube that also serves as a compression panel, a slim packing cube and a pack-flat shoe bag. The cubes are removable, so you can pack them separately.

How much does the expansion add?

The zipper is expandable, giving extra depth for souvenirs or a bulky layer. Expect the bag to sit wider and heavier when expanded, which matters on stricter airline sizers.