I don't use case for my electronics, nor am I a very careful person. So it's no biggie, but one day I noticed hairline-like scratches on my iPad and mbp. I also do not like the feeling of the zippers grinding(?) on my knits or other soft clothing when I reach for things inside the bag. Now I am looking for a brief with strap/buckle so I don't have to deal with that. But then I might be spoiled from all the buttery smooth zippers of riri / YKK excella from other stuffs.