I remember sitting for hours downloading and finding the right codec to watch episodes during the first season. The past was useless!
It was the first really addictive binge type show of that nature. I agree with @garjones, if you like the mini series you should be very impressed by what comes after. It hits the ground running (was the second episode called ‘30 mins’ or something? Brilliant piece of television) and is ridiculously solid from the outset.