If it has the name Dazzle on it, chances are most people here wouldn't touch it. If you need a good capture device, check out the Canopus products, they are very stable, unlike that other thing you mentioned.
I second that, been a Canopus 1394 user for a couple of years now with no complaints but I have heard too many concerning the Dazzle product mainly because of the USB thing. Firewire is the only way to capture video.