I have a few Briggs and Riley rollers so Im not positive how many times I have used each. But I have been doing about 100 segments per year on US Air plus 100K miles for year on UA for the last 6 years. Im estimating my 19 inch roller has done maybe 300-400 segments. The bags are dirty. Oh, and one time I am tired and check one, the TSA dolts rip the metal puller of one of the zippers. Still zips fine, but a little harder to grab. Havent bothered to send it back to get fixed.