Seriously. If you are looking for a small carry on but want a little extra room than your normal carry on. GET THIS. The top part, zips off and turns into a backpack. Why is this is so rad? Because you can fly with a carry on, and be able to carry even MORE than your friends and their carry ons. AND, when you're not on a the plane, and say, stuck on a 12 hour lay over somewhere, you don't have to lug some dumb backpack around. All you have to do is zip it back up to your carry on. I carried this bag all over Panama, and literally walked across the border to Costa Rica with this thing. The wheels are like real wheels, made out of rubber and not some crappy plastic. You can even take the ENTIRE thing and strap it onto you back like a backpage. I did that in a quick bind when I had to catch a boat. Unzipped the back, pulled out the backpack straps and wallah! Best bag ever. Tons of pockets and strap downs. You can't go wrong.