I've been buying Travelpro for years, as I fly all over Latin America and the US.  This particular piece will fit in an overhead bin and move easily down aisles.  On a long wait in Lima, I used it as a portable chair and used the metal handles as a backrest.

The luggage is quite rugged, and many flight attendants, etc. use the brand.  I easily get 4-5 years out of a piece and fly 10-12 times a year.