Ordered the 3-pc set and took the largest (28 in) and smallest (carry-on) on a cross-country round-trip flight. They worked well, rolled easily, did not have any issues with zippers, wheels, or anything! I did use plastic luggage covers to minimize scuffing, but most of the scuffs I got did come off with a magic eraser. These bags seem rather flimsy at first, but the upside is that they are super lightweight. I figure if they last me through a year or so of travel, they will be well worth it! (PSee full review