I have just purchased the application, and I think it is fantastic.
However, I feel that the units are sometimes mixed up. If they are not mixed up, then I just find them a little bit confusing.
The main problem is in the Graph.
The units on the top-left are correct, and indicate the current network usage as a speed (i.e. MB/s).
However, if you click on the graph and pause it, all the information on the bottom (down and up measures, as well as the per-process and per-host information) is displayed as “quantities” (i.e. MB, instead of MB/s). This is a little bit confusing.
Also, I would like to suggest adding a tooltip on the graph itself. The tooltip could appear when the user moves the mouse and show the up/down speed at the instant over which the mouse is positioned.
As I said, the application is already great, I’m just suggesting a couple of points that might be improved.