I've been using it for a while, and other than it being "lite" and technically more secure than IE, I haven't found it to be any faster or more stable.... I recently have actually started getting popups and some downloadtrojan.ject viruses coming through... no lie... This is on a WinXP Pro SP2 workstation with firewall enabled, behind a hard firewall. So I really think the theory of, more users = bigger bullseye is starting to take effect with Firefox. Time will tell if it is truly as secure etc.. as all the FOSS groups are saying....