It's glass so doesn't pick up or deliver unwanted odors.
It has a good seal.
It's square and stackable so makes efficient use of space on counter and in cupboards.
It comes in various sizes so it's versatile.
Looks great with colorful food and spices and stacks well. The top should be tighter so it doesn't come off when you pick this up, it's heavy. I would like a larger size that was still square shaped instead of taller.