I can't remember the site or the link comparing it to others, but it was the worst in the whole lineup at the percentage of virii it detected. They let loose 3000 virii on a system, most picked up 2900+, with PC Cillin being the winner, and Norton taking second.
InoculateIT only got around 2700 of them. Good for the price though. I guess it depends on how cheap you are, seeing as NAV 2000 cost only $30 last time I checked, with PC Cillin being even cheaper I believe.