I have a smaller carry on one - I love the locking feature, I'm shocked that no other spinners have that feature. The locking strength is definitely strong too, even on bumpy shuttle bus rides where other luggage rolls all over, my luggage stayed put. It only has a handful of flights, but no durability issues so far. I really like it, although I personally still prefer two wheel luggage for anything checked. If I were forced to choose a spinner, I wouldn't have any hesitation going with a larger Muji.