The size (54cm), however, is very small. If the handles are retracted, they already occupy a large part of the square away. For me auseichend for one night (clothing, bath products and maybe a pair of shoes). So make sure not something for a long vacation.
The rollers are smooth rolling, and so can my companion pinker very soft roll over smooth floors. The variable zipper is fitted all around and with a TSA lock.
The surface is scratch resistant and does not break even with stronger shocks. We use our Titan luggage on air travel and have already almost 20 flights without damage survived.