This is potentially a usedul app, but sufferes from severe memory leak
After a while of using the app, I noticed it takes the top spot in activity monitor when sorted by real memory in decending order - over 500MB. I killed it and restarted - it took less than 10 MB. Wait an hour - and its back to over 100MB. This looks like a serious memory leak!
Also, there does not seem to be a way to view the consumption on a monthly basis or export the data - that is critical to be able to properly control monthly caps.
Charged2011 about
Bandwidth+