I have 3 pcs of the Zero Zeroller collection. The carry-on, a 24" & a 32". I absolutely love all of them.
The first time you check 1 though you have to be prepared to get your bag back with scratches, dents etc. but it is VERY durable luggage. Going on almost 9 yrs on the 24" bag. It has been around the world many times and is still holding out. I would never check any soft side luggage so hardside was the way to go for me.
I do get strange looks when I have 2 or 3 of the zero bags at one time. It looks like I am carrying nuclear bombs.