LiteOn External Dvd Burner dx-20a4pu-06

I am looking to purchase an external DVD Burner:

Is usb 2.0 as reliable as firewire? I need something portable. I would rather have one that has both usb and firewire but don’t want to spend allot.

The drive itself works fine, it’s all dependent on the USB bridge chip. You may not be able to get up to 20x burning if that’s what you’re seeking. You can always just get the bare drive and then an external case that has both USB and 1394. The price will probably be similar to the preconfigured solution.