up and down stairs, on cobble stone streets, in and out of train station lockers and walk ways, this held up very well with minimum scratching on the bottom...what I put it through there should have been a lot of scratching but was glad that it still looks like new.  did 9 days with everyday moving around.  This is a sound product, loved it...and super light as well. the four wheels took a big beating and worked wonderful...can't say enough about this product. Love it!