OK, first of all, I love this item. I use it every day for my lunch at work, and wash it every night in the dishwasher. Very useful. A bit big for one person. I use the empty bottom tray for paper napkins, seasonings and cutlery. Main course in the middle tray, and the top tray (which is divided into 1/2, 1/4 and 1/4 sections is great for (e.g.)yoghurt, blueberries and a couple of crackers or cookies. Really the permutations are endless. One day I might take salad and left over desert, another day sushi and fruit with a chocolate bar. The space is large enough and adaptable enough for any meal - with the following reservations:
NOT SUITABLE FOR MICROWAVING
The box is made of melamine, is dishwasher safe but will release chlorine if microwaved.
NOT WATERTIGHT
If this box falls over, any liquids in the partitions of the top tray will leak into each other, and liquids in any compartment will leak out. I have a lovely stain on my car seat from balsamic vinegar which leaked out when the empty box fell over and the few remaining drops of dressing made a bid for freedom. This leakability is less of a problem than you might think - you carry it by the top handle, and it sits very securely on the square base. If you put heavier stuff in the bottom trays, then you increase stability. But definitely not suitable for soup (will leak and can't microwave).
This box comes in a number of colours (mine is all black), so I am going to post this review in each of the different versions because the design is exactly the same.
I get lots of interest and compliments on the box, and... did I mention that I love it? Grin.