Why buy Bento boxes? There are just a snack for me, and when something is a snack for me I mean it's cheap and wortheless and besides they are cold. The best way to eat Sushi is when the rice is warm does anyone tried REAL Sushi once? You can tell immediately the difference between packed and unpacked sushi.
But Bento box is also good once a while if you have to hurry or as a lunch in the midday.
Hiroki