NTOP - The right choice in Bandwidth monitoring

I was fiddling with lot of tools in firewalls to analyze

1.What is the Upload and download bandwidth we are using
2.who is uploading and downloading more
3.From what time how much they have downloaded
4.History caparison of bandwidth used choice

and so on ..

ISP's MRTG or SARG,mtr or iptraf whatever is not helping me to get all of the above data n little bit confusing,

NTOP helped me for catching actual life transfer and usage of internet.Using intranet dns resolves and gives me

consolidated report and it makes me easy to catch the culprits.

It works just by compilation or RPM installation.

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Br