love them love them love them!
They weight generic values of food, like bread, pasta, meat etc (monsterous list of food on it)
If you have a packet of something with the nutritional stuff, you can input the "per 100g" nv, then weigh it, et voila points calculated. If you hate having to divide/multiply numbers its brill.
you can do a recipe builder too, like putting lots of food in a pot, item 1 goes in point it, then item 2, points it, etc, then it gives you the recipe value so you can divide as you please. I haven't used that function yet but it looks clever
Expensive piece of kit but well worth it! x