I use both CyberGauge and MRTG. Both are similar products but CyberGauge allows you to poll your routers at 2 second intervals which is essential for companies and ISP's. When you are running a company backbone or something other than a home network and you need up to the second information on what is happening and nothing beats Cybergauge on the Mac. MRTG will only give you a 5 minute average. I run CyberGauge monitoring several different routers on an old G3 with two monitors with zero problems. CyberGauge is great!