I guess I expected more from a Thule product. First off, even though it is called a carry-on, it may not fit in to the guidelines of several airlines due to its dimensions - it's a little too wide and tall. Second,in my opinion, it has one major design flaw: when you unzip it, there is a slope to it. Basically, one side of the compartment is taller than the other. When it's zipped you don't notice it because the cover is built the same way so overall you get the same size all around, but it makes it difficult to pack. You can't shove things in because there isn't necessarily a side to hold it in. Also, while the dimensions are slightly bigger than another traditionally shaped (21") carry-on that I have, this one actually holds less! This is really only good for a weekend trip, and for that I still think a duffle bag would hold more and take up less space overall. I definitely expected better from this.