Don't let it (or anything, of course) install the tool bar, and don't let it send information to AVG... both are setup options which slow INET transactions considerably...
I find it heavier than AVG 7 but still bearable for the trade off in detections. It is seriously better at trojans now that AVGAS is rolled in. I still would not stack it up against my house brand, which is F-Protect, or against Kaspersky or Nod32, but I think it a great improvement for those who don't have the money to purchase one of the above.
They're on Avast now.
Mark