Very simple, straightforward, useful info beautifully displayed.
I've tried several similar tools before, but this was by far the most user friendly, complete (because it includes ALL your costs), and its almost real time updated, so you never miss a number.
Also, the only one that can grup as many seller accounts you have from different Amazon marketplaces. So if you sell in North-America and Germany, it will group all your business so you can have a great overall look of the total business. Then, of course, you can also look your numbers by each marketplace.