I just received this set, so no idea how well they will hold up to baggage handlers at the airports and cruise lines, but my initial impression is this is decent luggage, especially for the price. For anyone that may want to know the actual overall sizes of the three pieces, including wheels and handles, here they are. Large(29") is 30 inches tall x 17.25 inches wide x 12 inches deep. Medium(25") is 25.5 inches tall x 16 inches wide x 10.5 inches deep. Small(21")  is 21 inches tall x 14.25 inches wide x 9 inches deep. Those are un-expanded depths. You can add approximately an inch to the depth of all three if you unzip the expansion zipper. All are 40.5 inches tall with the telescoping handles extended. The only one of the three guaranteed to pass U.S.domestic size requirement for carry-on luggage is the Small, but my wife, who generally flies a couple times a year, has an old soft side carry-on that is 24T x 15W x 11D and she has never had an issue with it fitting in overheads on the planes she has flown on, so the Medium bag may squeeze by. She does usually gate check her old bag though, because she is short and has trouble getting it in the overhead bins. Anyway, I hope you all find this info useful. Only time will tell how durable this luggage is. The telescoping handles seem decent enough. My guess is the wheels will be the weakest link, they aren't top quality, but we'll see. By the way, they do nest inside each other. I also ordered the extra small, which is due tomorrow. I'll post a similar review on it when it comes.

The 18 inch Extra Small Bag: Apparently I can't post a separate review on it, so I'll just add to this review. Same impressions as the 3 piece set. The dimensions including wheels and handles are 18.5 inches tall x 13.25 inches wide x 9.25  inches deep. Check out my review of the matching Amazon Basics Underseat bag as well.