Like one of the other poster started it is big of course I Open it and tell tested the zipper etc. when I noticed right away is the zipper have little black tabs on them not the regular types. I think it will make it a lost easier to opne.
The wheel s all work of course and they have covers over them for protection. I love the colour black it matches my carry on bag. I travel frequently and I had a problem with my bag tipper over while waiting for a shuttle as a result of not packing correctly, it looks like that problem will be solved.