I have the 19 and typically use this for trips of <5 days. I can get 4 shirts, extra pants, workout gear and under garments along with toiletries and a jacket in the 19 no problem. I also wear a 44 jacket and just fold in half and then again with it in the dry cleaners plastic sleeve. Hang up directly upon arrival to the hotel and I'm good to go. If the jacket is needed the same day of arrival I just wear it on the plane.

Added bonus of the 19 is that is DOES fit in the O/H on most regional jets. This was the real reason I purchased and use so frequently. I have a 22 travel pro that see's mostly closet time unless going overseas for >5 days.