Broadband Optimizer is not so much for increasing speed on internet connections -- frankly, internet connections are, by nature, much slower than local area networks (LANs). Broadband Optimizer helps IMMENSELY with LAN connections such as copying large files across your own internal network between two computers. Transfer speeds between my PC and Mac increased from about 2MB/s to over 9MB/s with this tool installed (I only have a 100Mbps network, not gigabit). NOTE: On a larger network, this can cause problems by increasing communications between PCs even when they're not doing much, so I recommend using it only on small LANs (5 or fewer computers).