I researched, on the internet, what to look for when buying carry on luggage. Good wheels and proper size (21 inches which is one inch under the airlines standard) were two things that were stressed. I read the reviews on Amazon and choose this one because of the reviews and price point. We just came back from a trip and can rate this luggage as 5 stars--the wheels were smooth, 21 inch size was accurate, very roomy with a lot of pockets, and a bonus--a handle that was long enough for my 2 sons and husband who are all 6' 3". Don't look at any other carry on luggage. This is the one!