Is the Glimmering 28" carry-on or checked?

It is a medium checked case. At 28 x 17.1 x 10.2 inches externally, it exceeds carry-on limits for most airlines and is meant to be checked.

How much does it hold?

The packing capacity is 73L, which suits trips of roughly one to two weeks depending on how you pack. The case expands an extra 2.8 inches when you need more room.

Yes. The case has a 2.8-inch expansion zipper, taking the depth from 10.2 inches to about 13 inches.

What are the exterior and interior dimensions?

External dimensions including handles and wheels are 28 x 17.1 x 10.2 inches plus 2.8 inches expansion. The interior case measures 25 x 16.9 x 10.2 inches plus expansion.

What is the 8-wheel spinner system?

It uses eight wheels, two per corner, instead of the usual four. That gives more contact points and smoother rolling, though it means more wheels that can wear or break.

Is it good for airlines with strict weight limits?

The case is built to be extremely lightweight, which helps when carriers cap checked bag weight. Pack light, since the 73L capacity can easily push a full bag over limits.