I waited a long time before taking the leap and adding more boxes. I'd initially thought the Laptop Lunch and Ms. Bento (and later, Deli Club) would be sufficient for my needs. And they mostly were, but after a couple of months, I started to realize that I needed a few more to be able to have a rotation, since it wasn't always feasible or necessary to pack the two larger systems every day.
I looked at a lot of boxes before I decided on these. My wish list had many more, but I whittled it down since A) I don't want a lot of gear, B) not every box I wanted met a particular need. There are only a couple more I'd like, and a metal tiffin-style I've had my eye on for a few years, but I expect this will largely bit the sum total of my collection. (She said, famously.)